Outside London. Devon is a county in southwest England. Devon is adjacent to Cornwall, bordering the English Channel in the southeast, forming a famous Jurassic coast with the south bank of Dorset, and 200 1 was selected as a world natural heritage. Northwest Devon is the famous Peach Blossom Bay in England. Exmoor National Park is located in the middle of Devon, and Dartmoor National Park spans Devon. Devon also has many coastal resorts and some historical cities. The mild climate makes tourism play an important role in Devon's economy.