Pokkanai (Urelu) well- Limestone cave

                                               Urellu Pokkanai well which is situated in Urelu village of Kopay Divisional Secretariat. This is limestone karst feature dolines or sinkhole. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. Its shape is like a corn. The special characteristic of this well is it never dries up in any circumstances. According to the folklore, there are a few stories related to the formation of this well. It was formed after impact of thunder longtime before. Spiritual stories suggest that this sinkhole was formed when the Lord & Hero Rama in Ramayanam story shot his bow on earth as to find any spring to quit his thirsty. It also connects to the sea through underground naturally and passes the excess water to the sea in rainy days. It is used for irrigation purposes.