Many legends surround the Roman Well, one of Belgrade’s most mysterious attractions, built at the beginning of the 18th century, during the baroque reconstruction of the fortress. The well is 51m deep, with 3m in diameter and two spiral staircases that connect at a depth of about 35 meters forming a DNA-like shape. Alfred Hitchcock visited the well in 1964 and said that an environment like that was always a treat for him. A military bunker takes us into the mid-50s and the period of the Cold War. The bunker was never used for its original purpose.