The Basilica Cistern, also called the Yerebatan Sarayi or Yerebatan Sarnýcý, is the largest of several hundred ancient cisterns that still lie beneath the city of Istanbul, Turkey.
This cathedral-sized cistern is an underground chamber of 140 by 70 metres, capable of holding 80,000 cubic metres of water. The large space is broken up by a forest of 336 marble columns each 9 metres high. Curiously, the base of one of these columns is carved into the head of a medusa.
The cistern was used as a location for the James Bond film From Russia With Love.