Stock Photo: UK, Wales, Pembrokeshire. A young boy visits the site of the ancient neolithic dolmen at Pentre Ifan, Wales's most famous megalith, the remains of a vast Celtic burial mound.

Stock Photo: 4272-35125 UK, Wales, Pembrokeshire. A young boy visits the site of the ancient neolithic dolmen at Pentre Ifan, Wales's most famous megalith, the remains of a vast Celtic burial mound.