For the last 10 years, American artist Ra Paulette has been walking alone into New Mexico's desert to work. He spends his time carving a sandstone cave that he found, turning it into a wonderful subterranean space full of light.

For the last 10 years, American artist Ra Paulette has been walking alone into New Mexico's desert to work. He spends his time carving a sandstone cave that he found, turning...