Eth Pokuna

Eth Pokuna — literally "Elephant Pond" in Sinhala — is one of the most compelling relics of ancient Sri Lankan hydraulic engineering. Located within the sprawling ancient monastic world of Anuradhapura, it sits just off Lankaramaya Road and forms an integral part of the vast Abhayagiri Monastic Complex, which once housed more than five thousand Buddhist monks.

What are the dimensions and capacity of Eth Pokuna?

The reservoir measures approximately 159 metres in length, 52.7 metres in width, and 9.5 metres in depth, giving it a holding capacity of around 75,000 cubic metres of water. To put that in perspective, that is roughly 30 Olympic swimming pools — all constructed without modern machinery or earth-moving equipment. The scale alone makes it one of the largest ancient water tanks in Sri Lanka built for institutional rather than agricultural use.

How was Eth Pokuna built, and where did its water come from?

Water was fed into Eth Pokuna from the nearby Periyankulama Tank via a sophisticated system of underground canals and clay-and-stone pipework. Engineers of the Anuradhapura period understood hydraulic pressure and flow well enough to route water across considerable distances with minimal loss — a feat that continues to impress civil engineers today.

Fragments of the original piping are still visible at the site. Remarkably, the underground channels remain partially functional: after an unusually heavy monsoon season in 1982, water was recorded flowing through the ancient inlets from the Periyankulama Tank, demonstrating the endurance of a system that is well over a thousand years old.

What is the historical significance of Eth Pokuna?

The Abhayagiri Monastery, to which Eth Pokuna was attached, was one of the largest Buddhist monastic complexes in the ancient world. At its height it is believed to have accommodated upwards of five thousand resident monks, and the reservoir was almost certainly designed to meet their daily water needs — drinking, cooking, ritual bathing, and the irrigation of monastery gardens.

Anuradhapura itself served as the capital of Sri Lanka for over a millennium, and its water-management infrastructure — comprising dozens of tanks, canals, and sluices — underpinned that civilisational longevity. Eth Pokuna represents a refined chapter in that story: not an agricultural tank feeding a city, but a precisely engineered utility serving a single, enormous religious institution.

The site sits within the sacred precinct of Anuradhapura, a UNESCO World Heritage City, alongside landmarks such as the Abhayagiri Dagoba, Jetavana Stupa, and the Sri Maha Bodhi. Visitors who take the time to walk the Abhayagiri grounds encounter Eth Pokuna almost by surprise — its sheer size, half-hidden by mature trees, is quietly arresting.

What can visitors see at Eth Pokuna today?

The reservoir is accessible as part of a broader tour of the Abhayagiri Complex. Key things to look out for include:

• Stone-lined embankments — the original retaining walls that held tens of thousands of cubic metres of water remain largely intact.
• Visible pipework — sections of the ancient clay and stone conduits that once carried water from Periyankulama are exposed at ground level in several places.
• The Abhayagiri Museum — located within the complex, it provides archaeological context for the monastery and its water systems, including recovered artefacts from excavations around Eth Pokuna.
• The broader Abhayagiri Dagoba precinct — the towering stupa, refectory ruins, and moonstone carvings complete a site that rewards a half-day exploration.

How do I get to Eth Pokuna from Colombo or Kandy?

Anuradhapura is approximately 200 kilometres north of Colombo, typically a three-and-a-half to four-hour drive via the A9 highway. From Kandy the journey is around three hours heading north. Trains run from Colombo Fort to Anuradhapura on the Northern Line, making it a reasonable day trip from the capital, though an overnight stay allows a more relaxed itinerary.

Within Anuradhapura, the ancient city sites are spread over a wide area. Hiring a bicycle at your guesthouse is a popular way to cover the ground; tuk-tuks are also widely available. Eth Pokuna and the Abhayagiri Complex lie to the north-west of the main sacred city zone.

When is the best time to visit Eth Pokuna?

Anuradhapura can be visited year-round, but the most comfortable conditions fall between December and April, when the North Central Province is drier and cooler. Arriving early in the morning — before 9 a.m. — avoids both the midday heat and the peak foot traffic of tour groups. The post-monsoon period (October to November) brings green surroundings but occasional heavy showers.

Is Eth Pokuna part of a wider Anuradhapura itinerary?

It integrates naturally into a full-day Anuradhapura circuit. A logical route might start at the Sri Maha Bodhi, move through Brazen Palace and Ruwanwelisaya, then head north to Abhayagiri — taking in Eth Pokuna, the Abhayagiri Dagoba, and the museum — before finishing at Jetavana and Isurumuniya. Travellers with a deeper interest in ancient hydraulics may also want to compare the scale of Eth Pokuna with the giant surface tanks such as Tissa Wewa and Nuwara Wewa, which are visible from the road and equally impressive in their own right.

For those planning a wider Cultural Triangle itinerary, Polonnaruwa makes an excellent next stop: the medieval capital that succeeded Anuradhapura offers a contrasting but complementary window into Sri Lanka's hydraulic and architectural heritage.