Round cairn on Helvear Down, 300m NNE of Higher Trenoweth Farm, St Mary's

The National Heritage List for England records Round cairn on Helvear Down, 300m NNE of Higher Trenoweth Farm, St Mary's as a scheduled monument. The saved point comes from the centre supplied by the official record. Listing does not by itself mean that the public may enter the place.

Round cairn, dating to the Early Bronze Age (c. 2000–1500 BCE). These cairns were typically used as burial monuments and represent some of the earliest forms of ceremonial and funerary architecture in the British Isles.