| Bos Swallet | |
| Location: | Burrington Combe, Somerset, UK |
| Discovery: | 1946 |
| Geology: | Limestone |
| Entrance Count: | 1 |
| Registry: | Mendip Cave Registry[1] |
| Map: | Somerset |
| Coordinates: | 51.3219°N -2.7607°W |
| Grid Ref Uk: | ST 47086 58363 |
| Access: | Free |
Bos Swallet is a karst cave in Burrington Combe on the Mendip Hills in Somerset, England.
It is noted for being rather steep, with a length of and a depth of .
The cave was first discovered by schoolboys from the nearby Sidcot School in mid-1947, where they noticed the presence of "bone, flints, and pottery" which was later the site of archeological investigation, and multiple attempts to dig out the cave from 1985 to 1995 which turned up with minimal results.[2]