Bahour is a quiet commune at the southern edge of the Union Territory of Puducherry, best known for two things that rarely sit side by side: a very old irrigation lake and a cluster of Chola-period inscriptions. Known locally as Bahour Eri (eri means a tank or irrigation lake in Tamil), the waterbody is one of Puducherry’s largest wetlands and a recognised Important Bird Area. This guide covers what is worth seeing, when to go, how to reach it, and what the records actually say.
Bahour, in Puducherry district, Union Territory of Puducherry, is a farming commune about 21 km south of Puducherry city centred on an ancient irrigation tank (Bahour Eri). The lake is a seasonal freshwater wetland, a listed Important Bird Area, and the village holds Chola and Rashtrakuta inscriptions dating to roughly the 10th century.
Key takeaways
- Bahour Eri is described as the second largest lake in the Union Territory of Puducherry, according to The Hindu (2017) and biodiversity databases.
- It is a seasonal wetland: the Key Biodiversity Areas database records that it holds water roughly from September to March and stays dry for about five months.
- It is a recognised Important Bird Area (Islam and Rahmani, 2004); surveys recorded over 25,000 waterfowl of 16 species, including over 10,000 Eurasian Wigeon, in the mid-1990s.
- Bahour village lies about 21 km south of Puducherry city; the nearest railhead is Puducherry, and the nearest major junction is Villupuram, about 35–40 km away.
- The Chola-era Moolanathaswamy (Mulanathaswami) Temple nearby is an ASI-maintained monument, with its earliest wall inscriptions from the Rashtrakuta ruler Krishna III.
- The lake has no formal protected-area status and no entry fee; best visited for birds between roughly November and February.
About Bahour and Bahour Lake
Bahour is a commune, taluk and revenue village in Puducherry district, within the Union Territory of Puducherry, in south-east India. It sits about 21 km from Puducherry city, inland from the coast and north of the Pennaiyar (also written Ponnaiyar) river. The 2011 Census recorded 10,927 residents in Bahour revenue village, per Wikipedia’s citation of census data.
The name appears in several forms. You will see Bahour, Bahur and Bahoor in English, and “Vahour” or “Bahour” in French-era records. In Chola inscriptions the settlement is referred to by older names, discussed below. Do not confuse Bahour Lake with Ousteri (Oussudu) Lake, the territory’s other major birding wetland, which lies closer to Puducherry city and has a tourism boat club.
Bahour is agricultural country. The Hindu has called it the “rice bowl of Puducherry” because the land around the tank suits paddy cultivation. The lake is the reason: it is an old irrigation reservoir that still waters fields in the surrounding villages.
History: Chola inscriptions and an ancient tank
Bahour’s recorded history reaches back to the Chola period, around the 10th century, and survives mainly in stone inscriptions. The lake itself is described in Francis’s Gazetteer of the Union Territory of Pondicherry (1982) as the second largest and possibly the oldest irrigation lake in the region, dating to Chola times.
According to epigraphic and gazetteer sources summarised by Wikipedia, inscriptions of the Rashtrakuta king Krishna III (referred to as “Kannara Dev”) call the lake “Peria Eri” (the big lake) and “Kadambu Eri”. From the 25th regnal year of Rajaraja I onward, the village appears under names including “Vahour” and “Sri Alagiya Chola Chaturvedimangalam”. These are documented in S. R. Balasubrahmanyam’s Early Chola Temples (1971) and in G. Vijayavenugopal’s study of Pondicherry inscriptions.
The records are unusual because they describe how the tank was managed. Inscriptions mention a village council called Eri Varya Perumakkal that handled upkeep and water distribution, and tax arrangements in paddy for maintaining the lake, with penalties for default. Under Rajendra I, a labour rule reportedly required villagers of a certain age range to help with the annual digging. Bahour was also a seat of learning: evidence points to a Sanskrit studies centre, the Vidyasthana, associated with the fourteen branches of classical learning (Chaturdasa Vidya), with grants recorded in the late 9th century under Nrpatungavarman.
The clearest monument is the Moolanathaswamy (Mulanathaswami) Temple in the centre of Bahour, a Chola-period shrine maintained by the Archaeological Survey of India. Its earliest wall inscriptions are attributed to Krishna III rather than to the Cholas. The scholar Gabriel Jouveau-Dubreuil read its architecture as a transition from Pallava to Chola style.
Birds and the wetland
Bahour Lake is a recognised Important Bird Area (IBA), identified in Islam and Rahmani’s Important Bird Areas in India: Priority Sites for Conservation (2004), published by the Bombay Natural History Society and BirdLife International. It is one of two IBAs in the Puducherry area, the other being Ousteri Lake. BirdLife lists it under criteria A4i and A4iii, which relate to concentrations of waterbirds.
The counts behind the listing are high. Surveys by Balachandran and Alagarrajan (1995) and Jhunjhunwala (1998), cited by the BirdLife and Key Biodiversity Areas factsheets, recorded over 25,000 waterfowl of 16 species. These included over 10,000 Eurasian Wigeon (Anas penelope) and over 3,000 Little Grebe (Tachybaptus ruficollis), both above the 1% biogeographic-population threshold. About 25,000 waterfowl were counted in March 1995. The factsheet notes the lake serves as a staging and feeding site for migratory waterfowl, waders and terns during the outward (spring) migration.
The wetland is seasonal. The Key Biodiversity Areas database records that it receives water during the monsoon from about September to March and is dry for roughly five months. Its listed area is about 429 hectares on that database, with the site sitting at near sea level (elevation about 0–8 m); some sources give a larger figure, so treat the exact area as approximate.
These bird counts are from the 1990s surveys that triggered the IBA listing; current numbers vary year to year with rainfall. The factsheets note threats including agricultural intensification, poaching, fishing pressure, livestock grazing and agro-chemical runoff, and record that the site has no formal protected-area status.
Best time to visit
The best window for Bahour is roughly November to February, when north-east monsoon rains have filled the tank, migratory birds are present and daytime heat has eased. The lake is at its emptiest and least rewarding during the long dry season from about April to August, when much of the bed can be bare.
Puducherry has a hot, humid tropical climate, and most of its rain falls in the north-east monsoon between roughly October and December; the territory also lies in the path of Bay of Bengal cyclones in those months (Cyclone Fengal caused flooding in the area in November 2024). Treat the table below as general planning guidance; reconfirm current weather before travel.
| Season | Months | What to expect |
|---|---|---|
| Cool/birding season | Nov–Feb | Tank usually full after the monsoon; migratory waterfowl; most comfortable daytime temperatures. Best overall. |
| Hot season | Mar–May | Rising heat and humidity; water receding; birds thinning out by late season. |
| South-west monsoon/lean | Jun–Sep | Hot and humid, lake often low or dry; green fields but little to see on the water. |
| North-east monsoon | Oct–Dec | Main rains; tank refilling; cyclone and heavy-rain risk, so check forecasts and road conditions. |
How to reach Bahour
The simplest way to reach Bahour is by road from Puducherry city, about 21 km to the north. Local buses and shared autos run along the Puducherry–Cuddalore corridor towards Bahour, and a taxi or auto from the city is the most direct option for a half-day trip.
By air: Puducherry Airport (PNY) handles limited domestic flights (routes have included Bengaluru and Hyderabad). The main gateway is Chennai International Airport, roughly 135–155 km away by road (about 3–4 hours), with wider connections. Reconfirm flight routes close to travel, as they change.
By rail: The nearest station inside the city is Puducherry (PDY), with direct trains from Chennai Egmore and Villupuram. Villupuram Junction, about 35–40 km from Puducherry, is the nearest major railhead, and long-distance passengers often change there. Verify current trains on IRCTC or NTES before booking.
By road: Puducherry is well linked to Chennai by the East Coast Road and NH32 and to Villupuram by road. From Puducherry city, continue south towards Bahour; a local vehicle is useful as the lake and temple are spread across a rural commune.
| From | Approx. distance | Notes |
|---|---|---|
| Puducherry city centre | ~21 km | Bus, shared auto or taxi; base for the trip. |
| Puducherry railway station (PDY) | ~21 km | Nearest station; direct trains from Chennai Egmore/Villupuram. |
| Villupuram Junction | ~35–40 km (from city) | Nearest major railhead for long-distance trains. |
| Chennai airport (MAA) | ~135–155 km (from city) | Main air gateway; ~3–4 hours by road. |
Things to see and do
Bahour is a low-key rural stop rather than a built-up tourist site, so the two main draws are the lake and the Chola-period temple. Plan for a half day and set expectations around birdwatching and heritage, not facilities.
- Bahour Lake (Bahour Eri): walk or drive the bunds for birdwatching; best when full after the monsoon. No entry fee or ticket counter.
- Moolanathaswamy (Mulanathaswami) Temple: a Chola-period, ASI-maintained shrine in the village, with early inscriptions. Dress modestly as it is a living temple.
- Paddy countryside: the fields the tank irrigates give a sense of why Bahour is called the territory’s rice bowl.
| Spot | What it is | Time needed | Fee |
|---|---|---|---|
| Bahour Lake | Seasonal wetland and Important Bird Area; birdwatching along the bunds | 1–2 hours | None |
| Moolanathaswamy Temple | Chola-era temple, ASI monument, early inscriptions | 30–45 min | No fee for the monument; follow temple customs |
| Surrounding paddy fields | Working farmland fed by the tank | As you like | None |
A suggested half-day plan
A half day from Puducherry is enough to see Bahour comfortably. Start early for the best birding light and to avoid midday heat.
- Leave Puducherry city by about 6–6.30 am; drive ~21 km south to Bahour.
- Spend the first 1–2 hours at the lake bunds for birds while it is cool.
- Visit the Moolanathaswamy Temple in the village (30–45 minutes).
- Walk a short stretch of the paddy country, then return to Puducherry by late morning for lunch.
Birders who want longer can combine Bahour with Ousteri Lake on the way back, as both lie on the southern side of Puducherry.
Where to stay
There is no established tourist accommodation at Bahour itself, so most visitors stay in Puducherry city, about 21 km north, and make Bahour a half-day trip. Puducherry has the full range of options, from guesthouses to heritage hotels in the French Quarter.
The indicative bands below are planning estimates for Puducherry city, not Bahour, and vary sharply by season, weekends and festivals; reconfirm live rates when you book, and book well ahead for long weekends.
| Category | Indicative price/night | Notes |
|---|---|---|
| Budget | ₹1,000–₹2,500 | Guesthouses, basic hotels, hostels. |
| Mid-range | ₹2,500–₹6,000 | Standard hotels and some heritage stays. |
| Upper/heritage | ₹6,000 and above | French Quarter heritage and boutique hotels. |
Food to try
Eat in Puducherry rather than at Bahour, where options are limited to small village eateries. The city’s food blends Tamil cooking with a French-influenced strand unique to the former colony.
- Tamil meals (thali): rice with sambar (lentil-and-vegetable stew), rasam (a thin peppery soup) and vegetables, served on a plantain leaf.
- Tiffin items: idli (steamed rice cakes), dosa (fermented rice-and-lentil crepe) and filter coffee at local tiffin centres.
- French-Creole dishes: Puducherry’s cafes serve baguettes, croissants and dishes reflecting the town’s French heritage.
- Seafood: coastal Tamil-style fish and prawn preparations near the shore.
Budget estimate
A visit to Bahour costs little beyond transport, because the lake and the temple charge no entry fee. The main expense is a vehicle from Puducherry and your stay and meals in the city. The figures below are indicative planning estimates as of 2026 and should be reconfirmed locally.
| Item | Indicative cost | Assumptions |
|---|---|---|
| Lake and temple entry | ₹0 | No ticket; optional small temple offering. |
| Local transport (shared) | ₹200–₹600 | Taxi/auto half-day, shared between travellers; buses cheaper. |
| Meals | ₹150–₹500 | Local eateries to mid-range cafe in Puducherry. |
| Water, sundries | ₹100–₹200 | Bottled water, snacks. |
| Day total (excl. hotel) | ₹450–₹1,300 | Accommodation in Puducherry is extra (see bands above). |
Permits, fees and rules
No permit is required to visit Bahour, and no inner-line or special-area permit applies anywhere in the Union Territory of Puducherry. The lake has no formal protected-area status and no entry gate, according to the Key Biodiversity Areas factsheet, so there is no ticket for the wetland.
At the Moolanathaswamy Temple, follow normal temple etiquette: dress modestly, remove footwear, and ask before photographing inside, as practices at living temples vary. There is no published drone rule specific to Bahour; drone flying in India is governed by DGCA rules, so check those before flying anywhere near the lake or the ASI monument.
Practical tips
- Timing: go early morning for birds and shade; the open bunds offer little cover in the midday sun.
- Water level: there is little to see on the water in the dry months (roughly April–August); confirm the tank has filled before making a special trip for birds.
- Connectivity and cash: Bahour is rural. Carry some cash as well as UPI, as small vendors may not accept cards; mobile coverage is generally available but patchy in places.
- Health: the nearest hospitals and pharmacies are in Puducherry city; carry sun protection, water and any personal medicines.
- Solo and women travellers: Bahour is a quiet farming area; as anywhere rural, prefer daytime visits and let someone know your plan.
- What to pack: light cotton clothing, a hat, sunscreen and binoculars for birding; a light rain layer in the October–December monsoon.
- Respect the place: it is a working farming landscape and a living temple, not a built attraction; avoid disturbing birds, fields or residents.
Nearby places
Bahour pairs well with Puducherry city and the territory’s other wetland, both a short drive north. The table lists approximate distances for planning.
| Place | Approx. distance from Bahour | Why go |
|---|---|---|
| Ousteri (Oussudu) Lake | ~15–20 km | The territory’s other major bird wetland, with a tourism boat club. |
| Puducherry city (French Quarter, beaches) | ~21 km | Heritage streets, seafront, cafes; the main base for the trip. |
| Cuddalore | ~20–25 km | Neighbouring Tamil Nadu town to the south, on the coast. |
Frequently asked questions
What is Bahour known for?
Bahour is known for its ancient irrigation lake (Bahour Eri) and its Chola-period inscriptions. The lake, in Puducherry district, is described as the territory’s second largest and is a recognised Important Bird Area. The nearby Moolanathaswamy Temple is an ASI-maintained Chola-era monument with early 10th-century inscriptions.
Is Bahour Lake worth visiting for birdwatching?
Yes, for birdwatchers visiting between about November and February, when the tank is full and migratory waterfowl arrive. Surveys cited by BirdLife recorded over 25,000 waterfowl of 16 species, including Eurasian Wigeon and Little Grebe, in the 1990s. Numbers vary yearly with rainfall, and the lake is dry for about five months.
How do I reach Bahour from Puducherry?
Travel about 21 km south by road from Puducherry city. Local buses and shared autos serve the route, and a taxi or auto is the most direct option for a half-day trip. The nearest railway station is Puducherry; the nearest major junction is Villupuram, about 35–40 km away.
Is there an entry fee or permit for Bahour Lake?
No. Bahour Lake has no entry fee, ticket counter or permit, and no inner-line permit applies in the Union Territory of Puducherry. The Key Biodiversity Areas factsheet records the wetland as having no formal protected-area status. At the Moolanathaswamy Temple, follow standard temple etiquette and dress modestly.
When is Bahour Lake full of water?
Bahour Lake is usually full after the north-east monsoon, roughly from September to March, per the Key Biodiversity Areas database. It then dries out for about five months, so much of the bed can be bare between about April and August. Birdwatchers should confirm the water level before a special trip.
What is the difference between Bahour Lake and Ousteri Lake?
Both are Important Bird Areas in Puducherry, but they are different wetlands. Bahour Lake lies about 21 km south of the city and is a quiet, undeveloped tank. Ousteri (Oussudu) Lake is closer to the city, has a tourism boat club, and is generally the more visited of the two.
Last updated and sources
Bahour suits birdwatchers and heritage travellers who want a quiet half-day from Puducherry, ideally between November and February when the tank is full. Go early, treat it as a rural stop, and pair it with Ousteri Lake or the city.
Last updated: 2 November 2026. Fees, timings and permits change — reconfirm with official sources before you travel.
Sources: Key Biodiversity Areas factsheet, Bahour Lake (site 18343); BirdLife International Data Zone, Bahour Lake IBA; Islam, M. Z. and Rahmani, A. R. (2004), Important Bird Areas in India: Priority Sites for Conservation, Bombay Natural History Society and BirdLife International; Wikipedia, “Bahour” and “Bahour Lake” (used to locate the cited gazetteer and epigraphic sources: Francis, Gazetteer of the Union Territory of Pondicherry, 1982; S. R. Balasubrahmanyam, Early Chola Temples, 1971; G. Vijayavenugopal, Pondicherry Inscriptions); The Hindu, “Bahour: A field of dreams” (15 March 2017). Accessed September 2026.
