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

kastro sifnos island cyclades islands greece greek islands coastal view aegean sea scenic landscape religious site cliffside vibrant flowers architecture historical landmark travel destination mediterranean coast hiking path maritime blue waters nature spirituality culture worship island life tourism rocky coastline summer traditional church serene atmosphere ocean views clear skies rural setting heritage site picturesque ancient history cliff view coastal vegetation tranquility seaside beauty breathtaking scenery island hopping cultural experience peaceful retreat travel guide outdoor adventure hidden gem vacation spot