Imagine waking up to find a massive lake that wasn’t there yesterday—only for it to vanish overnight! These 20 mysterious lakes around the world appear and disappear in ways that baffle scientists.

KITA-KYUSHU--Once Japan’s most feared yakuza gang, Kudo-kai based here in Fukuoka Prefecture now exists mostly in name only. Its leader is in prison, the group’s ranks are depleted and those ...