The pre-historic monument of Stonehenge in Wiltshire is one of the most popular spots for modern-day druids to observe the event of Summer Solstice.

For the 2011 celebrations, revellers and druids from across the world gathered at this monumental spot to observe and perform the Pagan rituals of Summer Solstice at sunrise.

Often referred to as Midsummer, the day is the longest in the year marked by the closest alignment of the earth's axis to the sun. While the Northern Hemisphere observes the rituals on the 21st of June every year, the Southern part celebrates it only on the month of December.

However, this is not the only time of the year that druids gather at this spot for performing their rituals. Every year, they gather at the location to celebrate eight different festivals; each marking stages in the solar and lunar cycle.

Check out the latest images of druids celebrating Summer Solstice 2011 at Stonehenge: