I guess the prime example would be the logan stone at 'Porthcurno' , to the left of the beach, found myself on top of it a couple of years back now, fascinating landscape, plus you find yourself overlooking what is probably the best beach in the SW in my opinion!!.Also i read on the internet somewhere that theres a rocking stone on 'Carn Galva' on the Zennor side of Penwith!, failed to locate that one though, and reports of barrows on the Carn which have been excavated.