The glacier starts just below the summit and extends for some 2, 000 feet before giving way to huge boulder fields of volcanic rock.

CNN: The snows of Erukenya

Over the next 18 years, the masterpiece was built at a geomagnetic vortex near Landers, California, purportedly drawing from the powers of Giant Rock: an enormous, freestanding boulder thought by Van Tassel to be a centre of UFO activities.

BBC: A desert dome that inspires rock stars and star-gazers

But now, David Gibson says, the boulder - so-called because of a poem painted on the rock - is part of climbing history too.

BBC: Glasgow & West Scotland