While the search for the mythical underground city of Atlantis has yet to bear fruit, a very real medieval Italian village known as Fabbriche di Careggine has emerged from a lake after being submerged many decades ago.
A hydroelectric dam was built by the Italian energy company ENEL in the 1940s. That caused the waters to rise and artificially created Lake Vagli, which eventually covered over the 13th-century village Fabbriche di Careggine. According to the Italian daily La Repubblica, the village has emerged since then—the last time being in 1994 when the lake was emptied to do maintenance on the dam.