People gather at Stonehenge in Wiltshire, Britain, on June 21, 2016 to see in the new dawn. (Photo by Andrew Matthews/PA Wire)





Two fairy light-clad visitors brighten up the darkness during the summer solstice at the Stonehenge in Wiltshire, Britain, on June 21, 2016. (Photo by Natasha Quarmby/Rex Features/Shutterstock)





People gather to watch the sunrise on the longest day of the year during the summer solstice at the Stonehenge in Wiltshire, Britain, 21 June 2016. (Photo by Neil Munns/EPA)





People celebrate the summer solstice at the Kokino megalithic observatory, near the city of Kumanovo, Macedonia June 21, 2016. (Photo by Ognen Teofilvovski/Reuters)





Excitement as the sun begins to rise during the summer solstice at the Stonehenge in Wiltshire, Britain, on June 21, 2016. (Photo by Andrew Matthews/PA Wire)





People gather to see the sun rise at the ancient stone circle Stonehenge, during the Summer Solstice, the longest day of the year, in Wiltshire, United Kingdom, Tuesday June 21, 2016. (Photo by Andrew Matthews/PA WIre via AP Photo)





Revellers celebrate the summer solstice at Stonehenge on Salisbury Plain in southern England, Britain June 21, 2016. (Photo by Kieran Doherty/Reuters)





Today is also international yoga day – there are plenty of enthusiasts at Stonehenge. (Photo by Andrew Matthews/PA Wire)





Revellers celebrate the summer solstice at Stonehenge on Salisbury Plain in southern England, Britain June 21, 2016. (Photo by Kieran Doherty/Reuters)





A glowering dawn sky greets visitors at Castlerigg stone circle in Cumbria, Britain, on June 21, 2016. (Photo by Christopher Thomond/The Guardian)





Castlerigg is a more tranquil scene than Stonehenge. (Photo by Christopher Thomond/The Guardian)





A 5,000-year-old Neolithic monument doesn’t look the comfiest place to sleep at Castlerigg stone circle in Cumbria, Britain, on June 21, 2016. (Photo by Christopher Thomond/The Guardian)





Ada Wood, 10, perches on one of Castlerigg’s 38 stones during the summer solstice at Castlerigg stone circle in Cumbria, Britain, on June 21, 2016. (Photo by Christopher Thomond/The Guardian)