Ruin of the <a href="//commons.wikimedia.org/wiki/Burg_Drachenfels" title="Burg Drachenfels">castle Drachenfels</a> in <a href="//commons.wikimedia.org/wiki/K%C3%B6nigswinter" title="Königswinter">Königswinter</a>.
<a href="//commons.wikimedia.org/wiki/User:Tohma" title="User:Tohma">Tohma</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>