Crop circle, near the ancient monument of Avebury, UK
"Avebury is the site of an ancient monument consisting of a large henge, several stone circles, stone avenues and barrows, surrounding the village of Avebury in the English county of Wiltshire. It is one of the finest and largest Neolithic monuments in Europe, about 5,000 years old. Although older than the megalithic stages of Stonehenge 32 kilometres (20 mi) to the south, the two monuments are broadly contemporary overall. ... Avebury is a Scheduled Ancient Monument, a World Heritage Site, and a National Trustproperty." More
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