Hay Tor is one of Dartmoor's best-known sites. Granite from here was used to build Nelson's Column and Tower Bridge in London

Dartmoor is a national park in Devon, a county in England. Its highest point is High Willhays, 621 metres high. This is the highest point in the south of England. It has a large area of moorland, and is very hilly. There is much woodland on its lower slopes.

Dartmoor is famous for its tors—outcrops of rock on top of many of its hills. These are the remains of volcanic activity in the Carboniferous period.