Britain is preparing to celebrate the summer solstice, the longest day of the year, with gatherings expected at various historical sites and natural landmarks. The solstice will occur on Sunday, June 21, at 9:24 a.m. BST.

Stonehenge in Wiltshire, a UNESCO World Heritage site, is a major draw for solstice celebrations. Thousands typically gather to witness the sunrise align with the Heel Stone, the ancient entrance to the stone circle. These events are rare occasions where visitors are permitted close access to the neolithic monument, often featuring festivities and dawn yoga.

Further north, Castlerigg Stone Circle in the Lake District, erected around 3,000 BC, is another popular site. Believed to have served as an ancient astronomical observatory, it attracts people for celebrations that begin around midday and continue after dark. The site offers panoramic views and free admission.

In the Northern Isles, Shetland experiences its famous 'simmer dim,' a twilight period due to its high latitude, offering nearly 19 hours of daylight. This phenomenon, historically significant for Norse settlers, is marked by events like the Simmer Dim Bikers' Rally.

Alternative stone circles also attract visitors seeking quieter experiences. The Rollright Stones in Oxfordshire, a Neolithic site steeped in folklore, is a popular spot for modern-day pagans and astronomy enthusiasts, with events held for seasonal festivals. Glastonbury Tor in Somerset, known for its high vantage point, is another favored location for observing the summer solstice sunrise, drawing crowds for its spiritual and natural significance.

Milton Keynes, Buckinghamshire, offers a unique urban celebration with its Midsummer Festival. The city's grid system is reportedly aligned with the sunrise on the solstice, and the festival includes performances, workshops, and a closing parade.

For hikers, Ben Nevis, the UK's highest mountain, offers an opportunity to climb during extended daylight hours. Local organizations often host events, including guided walks and mountain adventures.

Other notable sites include Bryn Celli Ddu, a 5,000-year-old Neolithic passage tomb in Anglesey, where a beam of light illuminates the chamber on the solstice. Old Hunstanton beach in Norfolk provides a serene setting for wellness sessions, sound baths, and yoga gatherings. Avebury Henge in Wiltshire, a less crowded but significant Neolithic monument, draws pilgrims seeking connection with the natural environment. Finally, the Calanais Standing Stones on the Isle of Lewis, a 5,000-year-old monument rich in folklore, is a legendary spot for sunrise viewing.

These locations highlight a variety of ways Britons mark the longest day, blending ancient traditions with contemporary celebrations.