A stone circle built in a splendid setting, on a plateau in the mountain around Lonsdales, England. One of the best conserved sites in which the geometrical constructions discovered by Alexander Thom are visible is called what?

Castle Riggs

Explanation:

A stone circle is located near the north west England and formed by the 1300 stone circles of the British isles and was considered as part of the tradition of the Neolithic age. Is one of the best-conserved sites in England in thee unique geometric construction.