Manor Farm Swallet
|Manor Farm Swallet|
The entrance to Manor Farm swallet
|Depth||179 metres (587 ft)|
|Length||1,107 metres (3,632 ft)|
|Altitude||233 metres (764 ft)|
Manor Farm Swallet is a cave in the limestone of the Mendip Hills, in Somerset, England which was subject to numerous failed digging attempts between 1947 and 1973 as the surface shafts kept collapsing.  In 1973 access to the cave was gained by an artificial shaft and walling it against collapse.
- M.G.Norton (1969). "History of the dig at Manor Farm Swallet, Charterhouse-on-Mendip". UBSS Proceedings (UBSS) 12 (1): 83–88.
- Smart, P.L; Stanton, W.I. (1974). "Manor Farm Swallet, Charterhouse-on-Mendip, Somerset: An Account and Geomorphology". UBSS Proceedings (UBSS) 13 (3): 391–402.