Near the Jaffa Gate in the Old City of Jerusalem, the public can take tours of the Kishle, a military and prison compound at the Tower of David Museum (Jerusalem, Israel; phone +972 2 6265333, www.tod.org.il/en).
Last used in 1947 to house Jewish prisoners during the Israeli War of Independence against the British, the Kishle was recently excavated, revealing retaining walls and a sewage system dating back to the time of Herod as well as graffiti from when it was a British military post.
A 2-hour tour of the Kishle, in English, costs ILS45 (near $11) adult or ILS35 senior or student. Visit www.tod.org.il/en/the-kishle-and-the-citadel-moat and click on “Online Tickets.” Museum entry, ILS40 adult, ILS20 senior. Museum open 9 a.m.-4 p.m., Sun.-Thurs. & 9-2 Fri., Sat. & holidays Sept. 1-June 30 and 9-5 Sat.-Thurs. & 9-2 Friday July 1-Aug. 31.