Seven Martyrs Church, Kastro, Sifnos Island, Cyclades, Greek Islands, Greece, Europe

kastro cyclades greece aegean sea coastal beauty rocky cliff seaside architecture travel tourism scenic view religious site historic church island life ocean blue waters holiday destination nature cliffside landscape traditional serene picturesque culture heritage summer sunlight outdoor vacation peaceful spirituality worship landmark famous church historical landmark coastal architecture vibrant colors hiking exploration adventure idyllic summer getaway island vacation vacation spot seven martyrs