This was a Roman Saxon Shore fort built at the end of the 3rd century. At that time it would have been by the sea, which has now retreated beyond Romney Marsh. Some stonework is still standing but the position of the walls has changed over the years since it was built as a result of landslides. Unlike some of the other forts e.g Pevensey and Portchester it was not re-used after the Norman invasion. Instead Lympne Castle was built at the top of the cliff (top right of photo).
Private.
Directions
Between Lympne Castle and the Royal Military Canal