The Western Wall Tunnel is a tunnel exposing the Western Wall slightly north from where the traditional, open-air prayer site ends and up to the Wall's northern end. Most of the tunnel is in continuation of the open-air Western Wall and is located under buildings of the Muslim Quarter of the Old City of Jerusalem. While the open-air portion of the Western Wall is approximately 60 metres (200 ft) long, the majority of its original length of 488 metres (1,601 ft) is hidden underground. The tunnel allows access to the remainder of the Wall in a northerly direction.

The Western Wall, known in the West as the Wailing Wall, and in Islam as the Buraq Wall, is a portion of ancient limestone wall in the Old City of Jerusalem that forms part of the larger retaining wall of the hill known to Jews and Christians as the Temple Mount. The term Western Wall and its variations are either used in a narrow sense, for the section of the wall used for Jewish prayer, or in a broader sense, referring to the entire 488-metre-long (1,601 ft) retaining wall on the western side of the Temple Mount.