Extreme Sand Art
Most visitors to a beach are happy just writing their name in the sand.
But a coastal walk 12 years ago led Jim Denevan to a career in sand art that has seen him sculpt spectacular images on beaches and desert floors.
Among his creations is a 5km (three-mile) long spiral design in the Black Rock salt plain of Nevada.
The 47-year-old walked more than 160km (100 miles) to scrape his perfectly geometric shapes on to the desert floor using just garden tools and wooden sticks. The design took nine days to complete.
Mr Denevan, a surfer from California, said he sees the similarities between his art and crop circles in fields.
They seem to be a bit more geometric than my designs and planned in advance,’ he said.
‘I just turn up and start to create an image off the top of my head.’
His first image was of a 3.7m (12ft) long fish. Since then, he has improved his technique by using a rake to bring texture and variety to his art.
He has created about 600 sand drawings - mainly on beaches.