Full day Istanbul
Underground Cistern : Built by Justinian after 532, the Basilica Cistern stored water for the Great Palace and nearby buildings. Lost to memory, it was rediscovered by Petrus Gyllius, who came to Constantinople in search of Byzantine monuments. Gyllius, who noticed that the local people were lowering buckets through holes in the floors of their houses to retrieve water, found an entrance and thus put this mysterious subterranean architectural surprise back on the map. A mesmerizing attraction, sure to please!