Dunkery Beacon is the summit of Dunkery Hill, and the highest point on Exmoor and in Somerset. The sandstone hill rises to and provides views over the surrounding moorland, the Bristol Channel and hills up to away. The site has been visited by humans since the Bronze Age with several burial mounds in the form of cairns and bowl barrows. Sweetworthy on the lower slopes is the site of two Iron Age hill forts or enclosures and a deserted medieval settlement. At the top of Selworthy Beacon is a National Trust plaque and a view of the south coast of Wales across the Bristol Channel. The South West Coast Path also climbs the hill and ends slightly shy of the summit. Its elevation is . Behind the hill, there are precipitous cliffs. Near the summit are a series of cairns, thought to be the remains of round barrows, and the Iron Age Bury Castle. The round cairns have been scheduled as an ancient monument. In the 16th century, Selworthy Beacon was the site of a beacon to warn of impending invasions. The mausoleum of Sir Thomas Dyke Acland is about from Selworthy Beacon. The hills have a deep purple colour during the summer due to the covering of heather. Ling and bell heather, gorse, sessile oak, ash, rowan, hazel, bracken, mosses, liverworts, lichens and ferns all grow here or in surrounding woodland, as well as some unique whitebeam species. Exmoor ponies, red deer, pied flycatchers, wood warblers, lesser spotted woodpeckers, redstarts, dippers, snipe, skylarks and kestrels are some of the fauna to be found here and in nearby Horner Woods. Horner Woods are also the home to 14 of the 16 UK bat species, which include barbastelle and Bechstein's bats.