Candia (Iraklion), a Venetian fortress in Greece

8 hidden castles and fortresses in the U.S. you never knew existed

Palmanova Star Fort – Palmanova, Italy - Atlas Obscura

There's just something satisfying about completing an aboveground fort : r/dwarffortress

A Bucket List of Star Cities Scattered Across our Globe

42 Most Beautiful Castles in the World - Global Viewpoint

A Guide to Novi Sad: Exploring Serbia's Second City - Sailingstone Travel

9 famous castles of Ukraine — witnesses of noble past - We Are Ukraine

The Venetian Fortress – AVRVM – EU

The impressive fortress above Orahovica worth visiting

Kristiansten Fortress, Trondheim