The Tourist Information centre at Postbridge has a good and informative map on its side (by the toilet doors) which shows the public footpaths nearby. A good walk starts immediately behind the information centre, following the river valley through a deserted settlement up onto the moors; it is a 'lane' or 'drift' of moorland leading down through the farmland, which was used to drive the ponies and cattle down from the moors. Along the way there are cists and cairns to see, as well as the characteristic stone-faced earthen field boundaries (some with beautifully intertwined tree roots).
Another walk leads through the Forestry Commission land opposite; again there are deserted settlements, cists, cairns and stone rows to find (although you will need an Ordnance Survey map).
One of the best examples of a clapper bridge is at Postbridge. Made of huge blocks of granite balanced on granite piers, these types of bridge are mainly found in Dartmoor and Exmoor (a few in Wales). Most are Medieval (10th - 16th century) but a few are thought to be prehistoric in origin.
The Postbridge bridge was first recorded in 1380, although it was replaced by a new bridge (seen behind it in the photo) in the 18th century.
Walk up the path directly behind the Tourist Information centre, following the river valley. When you come to the first gate, look to your left; there you will see a wonderful stone-faced earthen field boundary, its stones interlaced with the roots of trees. A superb mix of grey and green, light and shade...............well worth the 15 minutes or so it will take you to get there (it's a level walk).