| Site Name | Area | Last Modified |
|---|---|---|
| WIGMORE SWALLET | Mendip | 01 Jan 2005 |
| WINDSOR HILL SWALLET | Mendip | 01 Jun 2019 |
| WINFORD REDDING PITS | Mendip | 02 Jun 2019 |
| WITHYBROOK SLOCKER | Mendip | 01 Jun 2019 |
| WITHYHILL CAVE | Mendip | 14 Jul 2020 |
| WOLF DEN | Mendip | 01 Jan 2005 |
| WOOKEY HOLE CAVE | Mendip | 28 Dec 2010 |
| WOOKEY HOLE CAVES | Mendip | 28 Dec 2010 |