In pictures: National Trust on Google Street View

Until recently, Google's Street View camera - which snaps 360-degree images for the search engine's online mapping tool - has been restricted to roads. But now a tricycle has taken to the hills...

The 18-stone (114kg) bike, known as a "trike", has toured the country taking pictures of 20 of the National Trust's most notable castles, country houses and landscapes - one of which is Corfe Castle in Dorset. Photo: Google Street View

Internet users can take a virtual tour of sites, including Lyme Park in Stockport, Cheshire - where Pride and Prejudice starring Colin Firth as Mr Darcy was filmed - from the comfort of their home. Photo: National Trust

Dartmoor's Castle Drogo - often billed as the last castle built in England - is another to have been snapped by Google's heavyweight camera. Photo: Google Street View

Cyclists covered about 125 miles - moving at an average speed of 2mph - while collecting images. Photo: National Trust

Landmarks include 5,000-year-old Stonehenge, in Wiltshire, which became a World Heritage Site in 1986. Photo: John D McHugh/AFP

Other locations include Lindisfarne Castle in Northumberland (pictured), Plas Newydd in Wales and Ham House just outside Richmond-upon-Thames near London. Photo: Google Street View

The 18th-Century ruins of Northern Ireland's Mussenden Temple and Downhill Demesne, perched upon a precipitous cliff edge, also made it onto Google Street View. Photo: Google Street View