Border marker on island Ziegenwerder in <a href="//commons.wikimedia.org/wiki/Frankfurt_(Oder)" title="Frankfurt (Oder)">Frankfurt (Oder)</a>, Brandenburg, Germany
<a href="//commons.wikimedia.org/wiki/User:Sicherlich" title="User:Sicherlich">Ralf Lotys</a> (Sicherlich)
CC BY 3.0
<span class="int-own-work">Self-photographed</span>