Roman cistern, Istambul. Turkey

Fresh water has always been an indispensable resource in the development of a city. Romans built aqueducts to provide fresh water but also water tanks to preserve it. The Basilica Cisterns in Istanbul -former Constantinople, is the largest in the city and an architectural work of art and engineering. Containing 336 columns in 28 rows of 12 each supporting a vaulted ceiling, the cistern could hold a massive 80 million litres.
Today almost empty it serves as a tourist attraction and an excellent setting for movie's like 'From Russia with Love' and 'Inferno'.