Damlataş Cave in Alanya, Turkey.  Discovered in 1948, it became popular tourist destination starting in the 1950s. The Turkish name, Damlataş Magarasi means "Cave of Dripping Stones."
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48264958@N00">BillBl</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/48264958@N00/2041974766/">Dalmatas Cave, Alanya, Turkey</a>