This gigantic man made pond is situated close to Lankaramaya.
This is 159 meters in length 52.7 meters across and 9.5 meters in depth with the
holding capacity of 75,000 cubic meters of water.
The water to this pond has
been supplied from the Periyamkulama Tank through a network of underground canals,
and you still can see part of the water lines made out of stone blocks.
These
underground canals still work after so many hundreds years and in 1982 after
a very heavy rainy season you could see water pouring though these inlets from
the Periyamkulama tank.
This tank probably has been used by the monks in the Abayagiri monastery who
amounted over five thousand priests.