Callanish Standing Stones
The Callanish Standing Stones on the island of Lewis and Harris date from prehistoric times. There are so many of them that they cannot be counted easily. The site dates back to the late Stone Age and early Bronze Age (3000-1500 BC), making it roughly contemporary with Stonehenge in England. The group of stones forms a circle with alignments radiating outwards at the compass points. The site is one of a series in the vicinity and it is generally assumed that they were used for astronomical observations.