It’s amazing what you can find in your own backyard in Israel. One family in the Galilee town of Eilabun discovered a 2000-year-old labyrinth of caves under their house that was used for storage by the Jewish residents of Eilabun during the Roman occupation.
http://www.jpost.com/Israel-News/Roman-era-cave-system-in-Lower-Galilee-plundered-by-thieves-507750