Nagarjuna Sagar: A Travel Guide to the Dam and Buddhist Island

Few places in South India bring together engineering ambition and ancient faith quite like Nagarjuna Sagar. Straddling the Krishna river on the border of Telangana‘s Nalgonda district and the Guntur (Palnadu) district of Andhra Pradesh, this is one of the largest and earliest masonry dams anywhere in the world, and among the tallest of its kind. Built between roughly 1955 and 1967, it was hailed by Jawaharlal Nehru as a temple of modern India, a phrase that has stuck to it ever since. Behind the dam lies one of the largest man-made lakes on earth, a reservoir so vast it seems more like an inland sea than a lake in the hills.

The dam takes its name from Acharya Nagarjuna, the great Buddhist scholar-monk who is thought to have lived and taught in this stretch of the Krishna valley many centuries ago. That connection turns out to be more than just a name. When the valley below the dam site was flooded to create the reservoir, archaeologists raced to save one of the richest Buddhist sites in South India before the waters rose, and what they rescued now sits on an island in the middle of the lake, reachable only by boat. Add to this a thundering waterfall, a crocodile centre, and the edge of India’s largest tiger reserve, and Nagarjuna Sagar becomes something rare: a single destination that rewards the historian, the engineer and the nature lover in more or less equal measure. It sits around 150km from Hyderabad, close enough for a comfortable day trip or an easy weekend away.

The dam and its reservoir

The dam itself is the first thing that draws the eye, and it deserves the attention. A vast wall of hand-cut stone blocks stretches across the Krishna, its crest gates lined up in a row that from a distance looks almost architectural rather than industrial. When the reservoir is full and the authorities open the crest gates, usually after a good monsoon, the sight of dozens of gates releasing water in great white plumes is genuinely spectacular, and it is the single image most associated with Nagarjuna Sagar. Whether the gates will be open on any given visit depends on rainfall and reservoir levels that year, so it is worth asking locally or checking recent reports before planning a trip around this specific spectacle.

Beyond the visual drama, the dam is a serious piece of multipurpose infrastructure. It generates hydroelectric power and irrigates a huge expanse of farmland across both Telangana and Andhra Pradesh, transforming what were once dry tracts into productive agricultural land. Given its strategic importance, there can be restrictions on where visitors may walk, stop or take photographs on and around the dam itself. These rules exist for good reason, and the sensible approach is simply to follow whatever instructions are posted or given by staff on site rather than pushing for a better vantage point.

The reservoir stretching back from the dam is enormous, its shoreline disappearing into forested hills on both sides. It is this scale, as much as any single view, that stays with visitors: a landscape reshaped entirely by one piece of mid-century engineering, now so settled into the countryside that it feels almost geological.

Nagarjunakonda: an island of Buddhist heritage

If the dam is the reason Nagarjuna Sagar exists on the map, Nagarjunakonda is the reason many travellers actually come. Long before the dam was built, the valley now under the reservoir was known as Vijayapuri, and it was one of the most important Buddhist centres in the whole of South India. From around the third to fourth century AD, it served as the capital of the Ikshvaku dynasty and grew into a major hub of Buddhist learning, with monasteries, teaching institutions and stupas built up over generations. It takes its name from Acharya Nagarjuna, the influential Mahayana philosopher associated with the site.

When plans were drawn up to dam the Krishna and flood the valley, this entire heritage was at risk of disappearing under water for good. In one of the more remarkable rescue efforts in Indian archaeology, teams excavated the site thoroughly before the flooding began, then carefully dismantled and relocated the key structures and finds to a hilltop that, once the reservoir filled, became an island of its own. A museum was built there to house and display what had been saved. The result is a heritage site unlike almost any other: not a ruin left where it always stood, but a deliberately preserved and relocated record of a civilisation, now surrounded on all sides by the very water that would otherwise have buried it.

Getting to the island is part of the experience. Visitors travel by boat, typically on APTDC launches from Vijayapuri, across open water to reach the island museum. Once there, exhibits include Buddhist relics and sculpture, reconstructed stupas, remains of ancient monasteries and university buildings, and striking Buddha imagery, including a large reconstructed stupa that gives a real sense of the scale of the original settlement. It is a quiet, contemplative place, and one where visitors should be mindful of museum rules, particularly around touching exhibits or using flash photography where it is restricted.

One important practical note: ferry services to the island do not necessarily run every day, and schedules can vary with the season and water levels. Since this is the highlight of a visit to Nagarjuna Sagar for most people, it is well worth checking current ferry timings and days locally, or with APTDC, before finalising travel plans, so the trip can be built around the boat rather than the other way round.

Ethipothala waterfall

A short distance from the dam, on the Chandravanka river, a tributary of the Krishna, Ethipothala waterfall makes for a lovely add-on to a Nagarjuna Sagar visit. The falls drop over twenty metres into a natural lagoon surrounded by greenery, and the setting is markedly cooler and more peaceful than the open expanse of the reservoir. Nearby there is also a crocodile breeding centre, which adds an extra point of interest for families and anyone curious about the conservation work being done along the Krishna basin. Most visitors combine Ethipothala with the dam and the island trip to make a full day of sightseeing.

Nagarjunasagar-Srisailam Tiger Reserve

The reservoir and its surrounding hills form part of the Nagarjunasagar-Srisailam Tiger Reserve, set within the Nallamala forest, which is the largest tiger reserve in India by area. This is not primarily a safari destination for casual visitors, since the core zone is largely restricted and access is limited, but its presence shapes the whole character of the region. The forested hills that ring the reservoir, the birdlife along the shore and the general sense of wilderness beyond the town all owe themselves to this vast protected landscape. Even without venturing deep into the reserve, travellers get a strong sense of being on the edge of something wild and largely untouched.

Anupu and other sights

On the Andhra Pradesh bank of the reservoir lies Anupu, where a reconstructed amphitheatre and related Buddhist remains give a further glimpse into the ancient culture that once thrived here, including what is thought to have been an ancient stadium alongside monastery structures. There is also a memorial pylon associated with the dam’s construction, a modest but worthwhile stop for anyone interested in the engineering story. The town of Nagarjunasagar itself, along with the settlement of Vijayapuri from which the island boats depart, is unpretentious and functional, built largely around the needs of the dam project and its visitors, but pleasant enough for an overnight stay.

Things to do

• Watch the dam and its spillway, ideally when the crest gates are open after good monsoon rains
• Take the boat across the reservoir to Nagarjunakonda island and spend time in its museum
• Visit Ethipothala waterfall and the nearby crocodile breeding centre
• Explore the reconstructed amphitheatre and Buddhist remains at Anupu
• Go boating on the wider reservoir for views of the surrounding Nallamala hills
• Photograph the dam, the lake and the forested shoreline, particularly in the soft light of early morning or late afternoon

Where to stay

Accommodation in Nagarjunasagar town and Vijayapuri tends towards the basic to mid-range, with the government-run Haritha or APTDC resorts on both the Telangana and Andhra Pradesh sides being the most reliable and popular choice for visitors. A handful of other small resorts and hotels round out the options. Genuinely high-end accommodation is limited, and many travellers simply treat Nagarjuna Sagar as a day trip or a single overnight stop from Hyderabad rather than a longer base. Given the limited number of rooms, especially around the government resorts, it is sensible to book ahead rather than arrive without a reservation.

Food and refreshments

This is a small town rather than a major tourist hub, so dining options are correspondingly modest. The APTDC or Haritha resort restaurants are usually the most dependable choice for a proper meal, alongside a scattering of basic local eateries serving Telangana and Andhra style food, which tends to be flavourful and often quite spicy. It is worth carrying water and some snacks, particularly for the boat trip and time spent outdoors around the dam and waterfall, and planning meals around the resort restaurants where possible rather than expecting a wide choice of dining venues.

Best time to visit

The cooler months from October to March are by far the most comfortable time to visit, since the Deccan plateau turns extremely hot between April and June. For those hoping to see the dam’s crest gates open and water gushing from the spillway, the period just after the monsoon, broadly August to October, offers the best chance, though this is entirely dependent on how much rain has fallen and how full the reservoir is that year. Winter remains the more reliable season for a relaxed visit to the island and general sightseeing, when conditions are pleasant throughout the day. Either way, it is worth checking in advance whether the ferry to Nagarjunakonda is currently running and whether the gates are open, since both vary with the season.

Getting there

Most visitors approach Nagarjuna Sagar from Hyderabad, which lies around 150km away by road, a journey of roughly three to three and a half hours along NH565. The site sits in Nalgonda district, on the Telangana side of the Krishna, with the Andhra Pradesh bank across the water. Hyderabad is also the nearest airport, making it the natural gateway for visitors arriving from further afield. By rail, the closest stations are Miryalaguda, about 40km away, and Macherla on the Andhra Pradesh side, though neither offers the frequency of a major junction, so onward road transport is generally needed. TSRTC and APSRTC buses run from Hyderabad, and self-drive or a hired car remains the easiest and most flexible way to cover the distance and combine the various sights around the reservoir.

Practical tips

• Check ferry timings and operating days for the Nagarjunakonda boat trip before travelling, since services may not run daily or in every season
• Ask locally whether the dam’s crest gates are open if that spectacle is a priority, as it depends on water levels
• Photography and access on the dam itself may be restricted in places, so follow posted rules and staff instructions
• Combine the island museum with Ethipothala waterfall and Anupu to make the most of a single day
• Carry water and sun protection, since much of the sightseeing is outdoors and exposed
• A car offers the most flexibility for covering the dam, the boat jetty, the waterfall and Anupu in one trip
• Treat the Nagarjunakonda museum and its exhibits with the respect due to a genuine Buddhist heritage collection, avoiding touching objects or using flash where asked not to

Where ancient and modern India meet

Nagarjuna Sagar is a rare meeting of ancient and modern India: one of the world’s great masonry dams holding back the Krishna, and, rescued from beneath its waters, an island museum of a 1,700 year old Buddhist civilisation reached by boat across the reservoir. Add a waterfall, a tiger reserve forest and the thunder of the spillway after the rains, and this quiet corner of Telangana rewards the curious traveller with something genuinely unlike anywhere else.