The entrance to a <a href="https://en.wikipedia.org/wiki/limestone" class="extiw" title="w:limestone">limestone</a> quarry off W. Tapp Rd in <a href="https://en.wikipedia.org/wiki/Bloomington,_Indiana" class="extiw" title="w:Bloomington, Indiana">Bloomington, Indiana</a>.
<a href="//commons.wikimedia.org/wiki/User:Vmenkov" title="User:Vmenkov">Vmenkov</a>.
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>