Straddling the border of Somerset and Devon, the Blackdown Hills AONB covers an area of 370 square kilometres (143 sq mi).
The hills reach their highest point of 315 metres (1,033 ft) above sea level at Staple Hill in Somerset.
The hills in the southern part of the area, near Honiton in Devon, are more gentle.
The Blackdown Hills are a sparsely populated area; much of the land is used for dairy farming.

The River Culm rises at a spring (grid reference ST2205016050) near Culmhead and flows west through Hemyock, then Culmstock to Uffculme before joining the River Exe on the north-western outskirts of Exeter.
The name of the river is thought to mean 'knot' or 'tie', in reference to the river's twists and loops; or is derived from a Celtic river-name meaning winding stream.
The River Otter rises near Otterford, where a stream feeds the Otterhead lakes: (ST225152).
It then flows south for 32 kilometres (20 mi) through East Devon to the English Channel at the western end of Lyme Bay.
The Permian and Triassic sandstone aquifer in the Otter Valley is one of Devon's largest groundwater sources, supplying drinking water to Taunton.
The other rivers are the River Yarty and the Corry Brook.

Villages in the northern, Somerset part of the hills include Staple Fitzpaine, Buckland St Mary, Whitestaunton, Wambrook and Churchstanton.
The larger, more southerly area in Devon includes Dunkeswell, Upottery, Smeatharpe, Hemyock, Blackborough, Yarcombe, Membury, Stockland, Sheldon, Cotleigh and Chardstock.
Straddling the border of Somerset and Devon, the Blackdown Hills AONB covers an area of 370 square kilometres (143 sq mi). The hills reach their highest point of 315 metres (1,033 ft) above sea level at Staple Hill in Somerset. The hills in the southern part of the area, near Honiton in Devon, are more gentle. The Blackdown Hills are a sparsely populated area; much of the land is used for dairy farming.
The River Culm rises at a spring (grid reference ST2205016050) near Culmhead and flows west through Hemyock, then Culmstock to Uffculme before joining the River Exe on the north-western outskirts of Exeter. The name of the river is thought to mean 'knot' or 'tie', in reference to the river's twists and loops; or is derived from a Celtic river-name meaning winding stream. The River Otter rises near Otterford, where a stream feeds the Otterhead lakes: (ST225152). It then flows south for 32 kilometres (20 mi) through East Devon to the English Channel at the western end of Lyme Bay. The Permian and Triassic sandstone aquifer in the Otter Valley is one of Devon's largest groundwater sources, supplying drinking water to Taunton. The other rivers are the River Yarty and the Corry Brook.
Villages in the northern, Somerset part of the hills include Staple Fitzpaine, Buckland St Mary, Whitestaunton, Wambrook and Churchstanton. The larger, more southerly area in Devon includes Dunkeswell, Upottery, Smeatharpe, Hemyock, Blackborough, Yarcombe, Membury, Stockland, Sheldon, Cotleigh and Chardstock.
Blackdown Hills