Pickering Castle
Open to visitorsan English Heritage site — check opening times and admission before you go
Earthworks onlybanks, ditches and platforms — read the ground, not walls
Pickering Castle preserves the earthworks of a former motte-and-bailey castle in North Yorkshire. It is one of 21 motte-and-bailey castles the Albion Guide lists in the county. The closest station is Malton, 13.2 km to the south.
More at the National Heritage List entry