The tunnel exposes a total length of 500 m (a third of a mile) of the wall, revealing the methods of construction and the various activities in the vicinity of the Temple Mount. The excavations included many archaeological finds along the way, including discoveries from the Herodian period (streets, monumental masonry), sections of a reconstruction of the Western Wall dating to the Umayyad period, and various structures dating to the Ayyubid, Mamluk, and Hasmonean periods constructed to support buildings in the vicinity of the Temple Mount. Warren's Gate lies about into the tunnel. At the northern portion of the Western Wall, remains of a water channel, which originally supplied water to the Temple Mount, were found. The exact source of the channel is unknown, though it passes through an underground pool known as the Strouthion Pool. The water channel was dated to the Hasmonean period and was accordingly dubbed the Hasmonean Channel.
