Lake drained like tub, fact or urban legend?
From a site called Damn Interesting, Lake Peigneur: The Swirling Vortex of Doom
Despite the enormous destruction of property, no human life was lost in this disaster, nor were there any serious injuries. Within two days, what had previously been an eleven-foot-deep freshwater body was replaced with a 1,300-foot-deep saltwater lake. The lake’s biology was changed drastically, and it became home to many species of plants and fish which had not been there previously.
I don’t know if this is a true story or not, but it sure is damn interesting.