| Site Name | Area | Last Modified |
|---|---|---|
| CHARDSWELL CAVE | Mendip | 29 Dec 2010 |
| CHARTERHOUSE AREA | Mendip | 21 Nov 2023 |
| CHARTERHOUSE CAVE | Mendip | 21 Nov 2023 |
| CHEDDAR GORGE CAVES (S) NORTH SIDE | Mendip | 24 Jan 2011 |
| CHEDDAR GORGE CAVES (S) SOUTH SIDE | Mendip | 11 Nov 2024 |
| CHELM’S COMBE QUARRY CAVES | Mendip | 01 Jan 2005 |
| CLAY HOLES | Mendip | 14 May 2019 |
| CLOFORD QUARRY CAVES | Mendip | 28 May 2024 |
| COMPTON MARTIN OCHRE MINE | Mendip | 29 Dec 2010 |
| CONNING TOWER CAVE | Mendip | 19 Jun 2023 |