Tower of San Marino Castle, Republic of San Marino.
<a href="//commons.wikimedia.org/wiki/User:Marcok" title="User:Marcok">Marcok</a> di <a href="https://it.wikipedia.org/wiki/Utente:Marcok" class="extiw" title="it:Utente:Marcok">it:wikipedia</a>
CC BY 2.5
<span class="int-own-work">Self-photographed</span>