Since the rise of seaside resorts with the arrival of the railways in the 19th century, Devon's economy has been heavily reliant on tourism. The county's economy followed the declining trend of British seaside resorts since the mid-20th century, but with some recent revival and regeneration of its resorts, particularly focused around camping; sports such as surfing, cycling, sailing and heritage. 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. More successful visitor attractions are particularly concentrated on food and drink, including sea-view restaurants in North-West Devon (such as one example belonging to Damien Hurst), walking the South West Coast Path, cycling on the Devon Coast to Coast cycle route and other cycle routes such as the Tarka Trail and the Stover Trail; watersports; surfing; indoor and outdoor folk music festivals across the county and sailing in the hill-surrounded inlet (ria) at Salcombe.