Hausten Tower in the abandoned village of <a href="https://en.wikipedia.org/wiki/Oesterholz-Haustenbeck" class="extiw" title="en:Oesterholz-Haustenbeck">Haustenbeck</a> (belonging to <a href="https://en.wikipedia.org/wiki/Schlangen" class="extiw" title="en:Schlangen">Schlangen</a>, <a href="https://en.wikipedia.org/wiki/Kreis_Lippe" class="extiw" title="en:Kreis Lippe">District of Lippe</a>, <a href="https://en.wikipedia.org/wiki/Nordrhein-Westfalen" class="extiw" title="en:Nordrhein-Westfalen">North Rhine-Westphalia</a>), at what is now the <a href="https://en.wikipedia.org/wiki/British_Army" class="extiw" title="en:British Army">British Army</a> <a href="https://en.wikipedia.org/wiki/Sennelager_Training_Area" class="extiw" title="en:Sennelager Training Area">Sennelager Training Area</a>; a military training facility near <a href="https://en.wikipedia.org/wiki/Sennelager" class="extiw" title="en:Sennelager">Sennelager</a>, <a href="https://en.wikipedia.org/wiki/Germany" class="extiw" title="en:Germany">Germany</a>.  The tower was erected in 1941 by the German Army for surveying the military exercises in that area.
<a href="//commons.wikimedia.org/wiki/User:Marcus_1969" title="User:Marcus 1969">Marcus 1969</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>