A tor, which is also known by geomorphologists as either a castle koppie or kopje, is a large, free-standing rock outcrop that rises abruptly from the surrounding smooth and gentle slopes of a rounded hill summit or ridge crest. In the South West of England, the term is commonly also used for the hills themselves – particularly the high points of Dartmoor in Devon and Bodmin Moor in Cornwall.

So this herd of horses just came freely to the rocks we've been visiting. I know very little about horses, but these whites were probably another breed than the usual Dartmoor pony, that are walking freely and help to give the area its unique character.