
Devon (/ˈdɛvən/ DEV-ən; historically also known as Devonshire /-ʃɪər, -ʃər/ -sheer, -shər) is a ceremonial county in South West England. It is bordered by the Bristol Channel to the north, Somerset and Dorset to the east, the English Channel to the south, and Cornwall to the west. The city of Plymouth is the largest settlement.
Devon has a varied geography. It contains Dartmoor and part of Exmoor, two upland moors that are the source of most of the county's rivers, including the Taw, Dart, and Exe. The longest river in the county is the Tamar, which forms most of the border with Cornwall and rises in Devon's northwest hills. The southeast coast is part of the Jurassic Coast World Heritage Site, and characterised by tall cliffs that reveal the Triassic, Jurassic and Cretaceous geology of the region. The county gives its name to the Devonian geologic period, which includes the slates and sandstones of the north coast. Dartmoor and Exmoor have been designated national parks, and the county also contains, in whole or in part, five national landscapes. High Willhays (Dartmoor national park) is broadly recognised as the most southernly nuttall/hewitt mountain in the United Kingdom, standing at 621 m/ 2039 ft above sea level.
In the Iron Age, Roman and the Sub-Roman periods, the county was the home of the Dumnonii Celtic Britons. The Anglo-Saxon settlement of Britain resulted in the partial assimilation of Dumnonia into the kingdom of Wessex in the eighth and ninth centuries, and the western boundary with Cornwall was set at the Tamar by king Æthelstan in 936. (Full article...)

The A303 is a trunk road in southern England, running between Basingstoke in Hampshire and Honiton in Devon via Stonehenge. Connecting the M3 and the A30, it is part of one of the main routes from London to Devon and Cornwall. It is a primary A road throughout its length, passing through five counties.
The road has evolved from historical routes, some of which are thousands of years old, including the Harrow Way and the Fosse Way. The modern route was first laid out in the early 19th century as the New Direct Road, a faster coaching route from London to Exeter. It was initially in demand but fell into disuse as railways became popular from the 1840s onwards. It was not thought of as a significant through route when roads were initially numbered, but was revived as a major road in 1933, eventually becoming a trunk road in 1958. Since then, the A303 has gradually been upgraded to modern standards, though there are still several unimproved parts with longstanding plans to fix them.
As a primary route to southwestern England, the A303 is frequently congested on its single carriageway sections. It passes through the Stonehenge World Heritage Site and the Blackdown Hills Area of Outstanding Natural Beauty, and attempts to upgrade the road in those areas have been controversial. In particular, the Stonehenge tunnel, which would see the A303 rerouted underground, has been proposed and delayed several times. Nevertheless, the road remains a popular alternative to motorway driving. (Full article...)

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