Tarr Steps are a prehistoric ( 1000 BC) clapper bridge across the River Barle, about south-east of Withypool and north-west of Dulverton. The stone slabs weigh up to 5 tonnes apiece, and the bridge has been designated by English Heritage as a grade I listed building, to recognise its special architectural, historical or cultural significance. There is little evidence of Roman occupation apart from two fortlets on the coast. Lanacombe is the site of several standing stones and cairns which have been scheduled as ancient monuments. The stone settings are between and high. A series of Bronze Age stone cairns are closely associated with the standing stones.