Batticaloa is a major city in the Eastern Province, Sri Lanka, and its former capital. It is the administrative capital of the Batticaloa District. The city is the seat of the Eastern University of Sri Lanka and is a major commercial centre. It is on the east coast, 111 kilometres (69 mi) south of Trincomalee, and is situated on an island. Pasikudah is a popular tourist destination situated 35 km (22 mi) northwest with beaches and flat year-round warm-water shallow-lagoons.
Batticaloa is in the eastern coast of Sri Lanka on a flat coastal plain boarded by the Indian Ocean in the east occupies a central part of the eastern Sri Lanka. Its average elevation is around 5 m (16 ft). Batticaloa district has three lagoons such as Batticaloa Lagoon, Valaichchenai Lagoon, and Vakari (Panichchankerni) Lagoon. Among these lagoons, Batticaloa Lagoon is the largest lagoon, which is 56 km (35 mi) long and has an area of 162 km2 (63 sq mi), extending from Pankudaweli in North and Kalmunai in South.
There are several islands within the Batticaloa Lagoon such as Puliayantheevu, Buffaloa Island and Bone Island. Many bridges are built across the lagoon connecting the landmasses and the islands. The Puliayantheevu is the metropolitan place of the city. The biggest bridge of all is Lady Manning bridge located at Kallady, which is the main access path to the city from the southern places of the district. This bridge is also famous for Singing fishes which were considered as musical sounds heard in the Kallady lagoon on a full moon day. A priest named Father Lang recorded this musical charm and broadcast it in the 1960s over the (Sri Lanka Broadcasting Cooperation)