Sleets Gill Cave
A phreatic tube which formed beneath the water table, Sleets Gill Cave is notorious for flooding and can fill with water without notice and without rain. Needless to say the system is dangerous and should not be entered by anyone other than experienced and suitably equipped cavers.
In 1992 Sleets Gill Cave made international news as the scene of a dramatic incident when two cavers became trapped by rising waters and had to be rescued by cave divers. This was believed to have been the first time that previously untrained scuba equipment users were successful guided out of a flooded cave by rescue divers - an experience that was drawn upon over a quarter of a century later when a party of schoolchildren became similarly trapped and were rescued from a flooded cave in Thailand in 2018.