Hen Domen Castle is an 11th century earthwork motte and bailey fortress, founded by Roger, earl of Shrewsbury. The high motte and compact bailey are guarded by a powerful series of ramparts and double ditches, all surrounded by a high counterscarp bank. The site is the most extensively excavated timber castle in Britain and has a complex history of building in wood. The dense cover of trees, makes it best viewed in winter. A mile south is Montgomery Castle.