The fort (a scheduled monument) has a single rampart with an external ditch.

It has dimensions of about 600 metres (2,000 ft) west to east and 350 metres (1,150 ft) north to south, enclosing an area of about 11 hectares (27 acres).

[1][2] The fort is called "Owen Glendower's Camp".

They never engaged in battle; with their supply routes blocked, the Welsh began to starve.

[3] During the English Civil War, local peasants met here to form a clubmen society to protect themselves from the ravages of both the Royalist and Roundhead troops.