The Altar Stone is a significant megalith within the Stonehenge monument.
Stonehenge is a massive stone monument located on a chalky plain north of the modern-day city of Salisbury, England.
Stonehenge, Avebury and Associated Sites is a UNESCO World Heritage Site located in Wiltshire, England.
Avebury is a Neolithic henge monument containing three stone circles, around the village of Avebury in Wiltshire, in southwest England.