Stone Bridge and Library (Pothgula)

Few visitors who walk the ancient streets of Anuradhapura ever find the stone bridge over Halpan Ela. Tucked close to the historic monuments of the sacred city and partially obscured by a later structure, this crossing survives as quiet evidence of an extraordinarily sophisticated civil-engineering tradition — one that flourished here more than two thousand years ago.

Where is the Halpan Ela Stone Bridge?

The bridge sits roughly 3 kilometres along Sangamitta Mawatha from Kuttam Pokuna (the Twin Ponds), one of Anuradhapura's best-preserved ancient bathing complexes. The road that leads to it continues further south to the more frequently visited stone bridge over the Malwathu Oya, so the two sites can be combined in a single unhurried half-day exploration of the city's hydraulic heritage.

Because the bridge is partly hidden behind a modern building, most guided tours bypass it entirely. Arriving with prior knowledge — or a guide who knows the site — is essential.

What does the stone bridge look like?

What remains today is a partial structure: large stone slabs laid across three rows of stone pillars. The construction technique is deceptively simple in appearance but required precise quarrying and placement to carry the loads of a functioning road crossing over a live waterway. The slabs were cut from rock outcrops in and around Anuradhapura, shaped without metal machinery, and set without mortar — relying instead on weight, balance, and careful alignment.

Scholars estimate that surviving bridges of this type in Anuradhapura date to at least the early centuries of the Common Era, placing their construction within the same broad period as the great dagobas and irrigation tanks that define the city's skyline.

What is the Pothgula library building?

Pothgula — literally "book chamber" in Sinhala — refers to a category of enclosed stone repository used in ancient Sri Lankan monastic complexes. These structures served the Buddhist sangha as secure stores for ola-leaf manuscripts, protecting the texts from humidity, insects, and the monsoon rains that visit the North Central Province each year.

The Pothgula associated with this site is a relatively modest example compared to the better-known specimen at Polonnaruwa, but it carries the same architectural logic: thick stone walls, a raised plinth to keep manuscripts clear of ground moisture, and minimal apertures to limit light and airflow. Even in its current weathered state, it illustrates how monastic scholars of ancient Sri Lanka treated the preservation of knowledge as an architectural problem worthy of serious stone construction.

Why is this site significant historically?

Anuradhapura's engineers were not only builders of religious monuments. The hydraulic infrastructure they created — tanks, canals, sluice gates, and bridges — sustained an urban population across centuries of variable rainfall. The Halpan Ela bridge is a small but telling piece of that system: a working crossing integrated into a network of channels that managed water across the entire ancient city.

The stone-working tradition that produced these bridges also fed into wider craft knowledge across the Asian world. Sri Lanka's metallurgical and stone-craft skills during this era are documented in historical and archaeological scholarship, reflecting the island's position on Indian Ocean trade routes that connected it to the Middle East, Persia, and the Mediterranean.

How do I get to the Halpan Ela stone bridge from Anuradhapura town?

The starting reference point is Kuttam Pokuna, which is well signposted and accessible from the main heritage zone. From there, follow Sangamitta Mawatha for approximately 3 kilometres. The bridge crossing point is not heavily marked, so it is worth confirming the exact turning with a local guide or your driver before setting out. A tuk-tuk from central Anuradhapura is the most practical option for the short journey.

When is the best time to visit Anuradhapura's lesser-known heritage sites?

The North Central Province is driest and most comfortable between May and September, when the southwest monsoon largely bypasses the region. December through February also sees relatively stable weather. Early mornings — before 9 a.m. — offer cooler temperatures and the sharpest light for examining stonework detail. Poya (full moon) days bring larger numbers of Sri Lankan pilgrims to the main sacred zone, which can affect traffic and parking near Kuttam Pokuna.

What else is worth seeing on the same visit?

The Halpan Ela bridge pairs naturally with Kuttam Pokuna itself, which demonstrates Anuradhapura's mastery of hydraulic design at a larger scale. The Malwathu Oya stone bridge, reachable by continuing along the same road, shows comparable construction at a wider crossing. Ruwanwelisaya dagoba and the Jetavanaramaya stupa complex are both within the heritage zone and round out a full-day itinerary covering Anuradhapura's engineering and religious heritage together.