Seetha bavi. It is beleived that Sri Ram created this using his bow and arrow to quench Sita's(wife of Rama) thirst when she felt thirsty.
<a href="//commons.wikimedia.org/wiki/User:Vaikoovery" title="User:Vaikoovery">Vaikoovery</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>