The Dungeon SSSI
| Site of Special Scientific Interest | |
 | |
Location of The Dungeon. | |
| Area of search | Merseyside |
|---|---|
| Grid reference | SJ251831 |
| Coordinates | 53°20′10″N 3°06′22″W / 53.336°N 3.106°W |
| Interest | Geological |
| Area | 1.2 ha (3.0 acres) |
| Notification date | 1977 / 1987 |
| Natural England website | |
The Dungeon is a 1.2-hectare (3.0-acre) Site of Special Scientific Interest (SSSI) situated 1 mile north-west of Heswall, on the Wirral Peninsula, England. The site was notified in 1988 due to its geological features which show the Tarporley Siltstone Formation of the Mercia Mudstone Group.