The Summer Solstice is celebrated by pagans in the UK, as thousands of people descend on the historic stone circle every year. /VCG Photo

This group of pictures was captured by Matthew Williams near the English county of Wiltshire. /VCG Photo

People have long wondered what's behind the appearance of giant crop circles around the globe, especially the latest one near the famous Stonehenge just before the Summer Solstice, the longest day of the year. /VCG Photo

The giant pattern, which stretches 180 feet and resembles an astrolabe with a flower in the center, appeared overnight a few days before the solstice on June 21. The mysterious pattern has confused farmers, authorities, UFO-logists and other paranormal investigators. /VCG Photo