Standing Stones:
The Lewis Chessmen were also found here in a small chest on this island and date back to the 12th century.
A link to the chessmen: https://www.google.co.uk/search?q=lewis+chessmen+lewis&ie=UTF-8&oe=UTF-8&hl=en&client=safari&gws_rd=cr&redir_esc=&ei=N9noUcatN8KFhQeS6IHwDg