Thousands celebrate summer solstice at Stonehenge

Summer solstice is the longest day of the year in the northern hemisphere.

Visitors lean on the stones at Stonehenge, which was built in three phases between 3,000 B.C. and 1,600 B.C.

Thousands of revelers visit the ancient stone circle at Stonehenge in Salisbury, England, to glimpse the sun on the summer solstice.

About 23,000 sun watchers gather on the Salisbury Plain about 80 miles southwest of London for summer solstice.