Economy of Devon of the railways in the 19th century, Devon's economy has been heavily reliant on tourism. The county's economy has followed the declining trend of British seaside resorts since the mid 20th century, with some recent revival. This revival has been aided by the designation of much of Devon's countryside and coastline as the Dartmoor and Exmoor national parks, and the Jurassic Coast and Cornwall and West Devon Mining Landscape World Heritage Sites. In 2004 the county's tourist revenue was £1.2 billion. The Met Office is in Exeter as is Connaught plc, and Pennon Group, the water company. The Wrigley Company
World Heritage Site Movement" (Argentina, Belgium, France, Germany, India, Japan, Switzerland) is a trans-regional property with component sites located in three regions - Europe and North America, Asia and the Pacific, and Latin America and the Caribbean. It is counted here in Europe and North America. Countries with fifteen or more World Heritage Sites, as of July 2018. Despite the successes of World Heritage listing in promoting conservation, the UNESCO administered project has attracted criticism from some for perceived under-representation of heritage sites outside Europe, disputed decisions on site selection and adverse impact of mass tourism on sites unable to manage rapid growth