Drowning pit
A drowning pit, drowning pool, murder-pool or murder hole (not to be confused with defensive murder holes) was a well or pond specifically for executing women and girls (for males the dule tree or gibbet was used) under Scottish feudal laws. Rivers or lochans were used if conveniently situated near to a moot hill, where the baronial court dempster would announce the death penalty. The term fossa was also used, as in the phrase furca and fossa.