Stock photography, photos: Pera Castle Stock photos of The 10th century ruins of Pera Castle, Horio, Kalymnos, Greece Photograph: © Alistair Baird Click for a larger image and more information Keywords associated with this stock photo: castle, ruin, pera, horio, pothia, kalymnos, templar, st john, dodecanese, kalymnos, mediterranean, historical, fort, stronghold, knight, greece, greek, whitewash, blue