Tourists at Yerebatan Sarayi Cistern, Istanbul, Turkey

yerebatan sarnicicistern sultanahmet architecture building historic district downtown cisterna basilica columns colum ancient byzantine empire darkness illuminated illumination lighted water reservoir cisterns pillar mysterious indoor underground city metropolis megacity metropole destination cityscape townscape town citytrip europe european constantinopel byzantium byzanz bosporus bosphorus turkey turkisch turk orient holiday holidays travel travelling tourism view sight urban tourists at yerebatan sarayi cistern istanbul turkey horizontal format