One of the entrances (or at least the upper part-I had to cut out the doors to remove myself from the photo)
<a href="//commons.wikimedia.org/wiki/User:ZappaOMati" class="mw-redirect" title="User:ZappaOMati">ZappaOMati</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>