The Outer Hebrides is an ancient land, in terms of its population. A recent archaeological dig on North Uist revealed signs of habitation dating back to around 4000BC. A relative lack of development across the islands means that many such relics, artifacts and indications of previous civilisations, races and people still exist.
One of the more noticeable signs of previous societies are standing stones, which can be found in many places across the islands; in fact, it is rare to go for a long walk anywhere and not come across one or several. The one above is close to the west coast of Harris, and is from the Flickr picture set of Dowens.
Here on Berneray, there are a number of standing stones; most of the hills have one or several, and the machair has a large number of various moved stones, dating from the Viking settlers and before.