A Crack in the Mountain review – scrupulous look at the exploitation of a natural wonder | Film
“There was quite a substantial breeze coming out. A substantial breeze normally would signify a substantial cave.” A nice piece of Brit understatement about what is a late-breaking entry for a wonder of the world: Vietnam’s Hang Son Doong, the largest cave system on the planet by volume, stumbled upon by jungle logger Ho Khảnh in 1991 and only surveyed in 2009. The stupefying shots here of towering limestone buttes, skylight dolines and sodden subterranean rainforest look computer-generated, like something from…