SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Llech Y Tripedd standing stones. This is the remains of a chambered tomb from the neolithic (late stone age) time, which lasted from around 4500 to 1700 BC (6500 to 3700 years ago). When the tomb was in use, the stones would have been covered in earth, making a chambered dome. Erosion over millennia has left just the stones visible. The Llech Y Tripedd tomb is near Moylgrove, in Pembrokeshire, Wales, UK.
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