Underneath Istanbul are hundreds of cisterns – ancient Byzantine water stores. The largest one in the city has been drained so visitors can wander through an underground forest of columns. It’s a stunning sight to see. This cistern was built in the 6th century in the Byzantine era. This cathedral-size cistern is an underground chamber approximately 138 metres by 64 metres – impressive!  The ceiling is supported by a forest of 336 marble columns, each 9 metres high, arranged in 12 rows of 28 […]