This rare triple barrow is handily placed right next to a lay-by / passing place on a minor road 150 metres from the entrance to Crowdy Reservoir, although there is no entrance into the field here. It’s quite a sight and is surrounded by a ditch that is now well trodden by the livestock.
Craig Weatherhill, in “Cornovia: Ancient Sites of Cornwall & Scilly” (Cornwall Books - 1985, revised 1997 & 2000) says “Bronze Age triple round barrows are area outside Wiltshire. This example has three mounds about 1.2m high and 24 m in diameter, aligned roughly north-west to south-east, surrounded by a shallow oval ditch with diameters of 67m and 37m. There are no records of any finds, even though all three mounds have hollowed centres”.
There is another barrow further along this road, just past the water works, at SX127830. It was a pretty standard looking barrow, with sheep clambering all over it.