The 25 Best Small US Cities to Spend the Weekend... I've got a lot of bucket filling to do on this one. Have only spent time in two of these cities. Although, I do have the good fortune of living in one of them.
Basilica Cistern - A stone's throw from the Hagia Sofia (and a couple stories down, underground) lies one of the most impressive wonders of Istanbul.Built sometime around 6th century CE, the structure was a large basilica involved in commerce and the arts. It was later converted to a cistern during Emperor Justinian's reign to store water for the palace - capable of holding almost 21 million gallons of water.