The Cistern in Istanbul, Turkey is somewhat lesser known than the nearby Hagia Sofia and Blue Mosque. It was built in the 6th century by the Romans. So much of the experience is lost in the photograph: the damp, moldy smell of the air, the echoing drops of water, the coolness of being underground. I didn’t have a tripod so I had to steady my camera on the nearby walkway railings. Not ideal but it worked.