The original post: /r/damnthatsinteresting by /u/Lord_Pakeer on 2024-12-25 04:53:37.

Original Title: 2500 Years Old Man Made Climate of Sri Lanka , Lanka has the highest density of reservoirs in the world, with 230 hectares of reservoirs for every 100 square km of land. Most of the reservoirs and cannels are 1000 to 2500 years old. Map of Old man made tanks & cannel