Revellers dance during the summer solstice at Stonehenge, near Salisbury in England, Tuesday, June 21, 2011. The ancient stone circle of Stonehenge is a World Heritage Site erected between ... more 
Revellers dance during the summer solstice at Stonehenge, near Salisbury in England, Tuesday, June 21, 2011. The ancient stone circle of Stonehenge is a World Heritage Site erected between approximately 3000BC and 1600BC and despite years of research the reason behind its construction remains a mystery. The summer solstice in the northern hemisphere occurs annually on June 21 and is the time at which the sun is at its northernmost point in the sky. (AP Photo/Matt Dunham) less 
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Associated Press | Photo By Matt Dunham
Tue, Jun 21, 2011 6:17 AM EDT