The medieval ruin of the moated manor house at Penhallam is thought to date from the late twelfth Century. The earliest part of the site dates to around 1180-1200 and were more extensively developed around 1224-1236.
Managed by English Heritage the site is open at all times of the year and entry is free. It is reached by a path through woodlands from a small car park or by a public footpath through Bury Court. It is east of the A39 at Treskinnick Cross north of Week St Mary.