stonehenge

from WordNet (r) 3.0 (2006)

Stonehenge
    n 1: an ancient megalithic monument in southern England;
         probably used for ritual purposes

from The Collaborative International Dictionary of English v.0.48

Stonehenge \Stone"henge\, n.
   An assemblage of upright stones with others placed
   horizontally on their tops, on Salisbury Plain, England, --
   generally supposed to be the remains of an ancient Druidical
   temple.
   [1913 Webster]