Castlerigg Stone Circle is a prehistoric monument located in Cumbria, England, near the town of Keswick in the Lake District. It is one of the oldest stone circles in the country and dates back to around 3200 BC, making it even older than Stonehenge.

The circle consists of 38 stones, including 30 standing stones arranged in a rough oval, with the tallest standing at around 3 meters high. Some of the stones have carvings on them, including spirals and circular patterns.

The purpose of the circle is not known for certain, but it is believed to have been used for religious or ceremonial purposes. The stones may have been aligned with the movements of the sun, moon, and stars, and may have been used to mark the changing seasons or the cycles of the agricultural year.

Castlerigg Stone Circle is situated on a hilltop with panoramic views of the surrounding countryside, including nearby fells and mountains. It is a popular tourist attraction and is visited by thousands of people each year.