Marakkanam in Tamil Nadu, India has many salt pans where they produce sea salt by drying up sea water that is pumped into pans. The photograph depicts some typical salt pans.
<a href="//commons.wikimedia.org/wiki/User:Dey.sandip" title="User:Dey.sandip">Dey.sandip</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>