The Ostkastell (East fort) in <a href="https://en.wikipedia.org/wiki/Welzheim" class="extiw" title="en:Welzheim">Welzheim</a>, Germany.<br> 
The Ostkastell is one of the two ancient roman forts of Welzheim <br> at the <a href="https://en.wikipedia.org/wiki/Limes_Germanicus" class="extiw" title="en:Limes Germanicus">Limes Germanicus.</a> It was reconstructed in 1980.
<a href="//commons.wikimedia.org/wiki/User:Wildfeuer" title="User:Wildfeuer">Wildfeuer</a>
CC BY-SA 3.0
<span class="int-own-work">Self-photographed</span>