Hezekiah, king of Judah, fortified Jerusalem at the end of the 8th century BC, just before the invasion of Sennacherib. As part of his building project, Hezekiah brought water into the city of Jerusalem through a tunnel carved from over half a kilometer of bedrock (2 Kings 20:20). A six percent gradient was designed into the excavation to allow water to flow from the Gihon spring into the pool of Siloam (compare John 9:7).
Archeological excavations reveal that Jericho was violently destroyed sometime toward the end of the Bronze Age. The walls seem to have been thrown down by sudden force, as if by an earthquake. Charred wood shows that what was left of the city was burned. Excavators have also found food supplies buried in the destroyed city, which shows it was not captured by siege.
 Hubbard, Shiloh, Elliot Ritzema, Corbin Watkins, and Lazarus Wentz with Logos Bible Software and KarBel Media. Faithlife Study Bible Infographics. Bellingham, WA: Logos Bible Software, 2012.