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A journey through this ancient underground waterway takes you along dimly lit walkways that weave around 336 marble columns rising 26 feet to support Byzantine arches and domes. Full review →Come early to avoid the long lines and have a more peaceful visit.
Built more than 1400 years ago under the direction of the Byzantine Emperor Justinian—the same guy responsible for the Hagia Sophia—this underground cistern once stored water for the whole city. Full review →
When those Byzantine emperors built something, they certainly did it properly! Full review →
Eighty-two feet below Istanbul is a 450-foot-long, 213-foot-wide former royal reservoir. Full review →