Lyme Regis is a town in west Dorset, England, 25 miles (40 km) west of Dorchester and east of Exeter. Sometimes dubbed the "Pearl of Dorset", it lies by the English Channel at the Dorset–Devon border. It has noted fossils in cliffs and beaches on the Jurassic Coast, a World Heritage Site and heritage coast. The harbour wall, known as The Cobb, appears in Jane Austen's novel Persuasion, the John Fowles novel The French Lieutenant's Woman and the 1981 film of that name, partly shot in the town.

Dorset is a ceremonial county in South West England. It is bordered by Somerset to the north-west, Wiltshire to the north and the north-east, Hampshire to the east, the Isle of Wight across the Solent to the south-east, the English Channel to the south, and Devon to the west. The largest settlement is Bournemouth, and the county town is Dorchester.