Clach an Truiseil (Trushal Stone), Ballantrushal, Isle of Lewis, Outer Hebrides, Scotland This 6 meter high menhir sits on one of the few safe harbors in this part of Lewis and may have been used as a signal to seafarers. Its date is uncertain. Previous: Barnhouse Stone, Orkney Islands, Scotland Next: Geant du Manio, Carnac, Brittany, France