Abhayavapi

Abhayavapi (Sinhalese: ) or commonly Abhaya Wewa (Sinhalese: ) is a reservoir in Sri Lanka, built by King Pandukabhaya who ruled in Anuradhapura from 437 BC to 367 BC, after constructing the city. This is now popularly known Abhayawewa'.
Size.
Area is ; length of the "Waw Kandiya" (Sinhalese: English: embankment) is and height is . Width of the top of the embankment is to .
Purpose.
Built inside the ancient Anuradhapura, it supplied water to then city population.