From the town side the Archangelos castle doesn't look much, but is situated in a dominant position overlooking the second largest city on Rhodes!
Inside it's just a heap of stones and rough walls, but once you head out to the east there is quite a stunning view of it.
Further on this rocky promontory may not look much, but it's Feraklos Castle, the last site held by the Knights of St John on the island. In the distance is Lindos.
Close up you can see what made it so impregnable. The walls are built on top of a cliff with only one crumbling staircase to reach it.