lanyon quoit dolmen neolithic tomb between carn galver hills and greenburrow engine house tin mine ruins in cornwall

ancient blue britain burial chamber capstone celtic cornish cornwall england cromlech dolmen europe granite green heritage historic history horizontal kernow lands landscape lanyon quoit lichen madron megalith monolith moor moorland mysterious mystery nature peninsula penwith prehistoric rugged sky spiritual standing stone tomb wild neolithic carn galver hills greenburrow engine house tin ruins grass