Thoovanam dam at Megamali in theni district.  This dam is the one of the source for Surili falls.
<a href="//commons.wikimedia.org/wiki/User:Sivaraj.mathi" title="User:Sivaraj.mathi">Sivaraj.mathi</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>