Map of the former high speed race track "<a href="https://de.wikipedia.org/wiki/Grenzlandring" class="extiw" title="de:Grenzlandring">Grenzlandring</a>" around <a href="https://de.wikipedia.org/wiki/Wegberg" class="extiw" title="de:Wegberg">Wegberg</a>
Daniel Ullrich, <a href="//commons.wikimedia.org/wiki/User:Threedots" title="User:Threedots">Threedots</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>