Birket Ram

TBirkat Ram is a crater lake in The Northeastern Golan Heights. The only sources of the lake are rain water and an underground spring. The water does not leave the lake to any other body of water. According to The Talmud, Birkat Ram is one of 3 underground springs, along with Hamat Gader in The Southeastern Golan Heights and Hamat in Tiberias,  that opened up in The Flood of Noah and didn't close up again after The Flood.