The annual ritual is celebrated at the world heritage site of Stonehenge on England’s Salisbury plain.
Revelers surround the ancient Stonehenge monument prior to the summer solstice on Salisbury plain in southern England. Stonehenge is a celebrated venue of festivities during the summer solstice -- the longest day of the year in the northern hemisphere -- and it attracts thousands of revelers, spiritualists and tourists. Druids, a pagan religious order dating back to Celtic Britain, believe Stonehenge was a center of spiritualism more than 2,000 years ago. Kieran Doherty/Reuters