Maintower, in Frankfurt am Main.
<a href="//commons.wikimedia.org/wiki/User:Timsdad" title="User:Timsdad"><font color="green"><b>timsdad</b></font></a>
CC BY-SA 3.0
Picture taken by <a href="//commons.wikimedia.org/wiki/User:Timsdad" title="User:Timsdad"><font color="green"><b>timsdad</b></font></a>