"Dark, Difficult, Dank Spaces": Rob Petit on His Tribeca World Premiere Underland

Based on British author Robert Macfarlane's non-fiction book of the same name, Underland, the feature debut from Rob Petit, investigates the world hidden beneath our feet. In particular, the film ventures into the depths of a cave system in Mexico once used for ancient Mayan rites; a Canadian dark matter research facility located two kilometers beneath the surface; the exhilarating, if treacherous, storm drain system beneath Las Vegas; and a haphazardly abandoned uranium mine in the American Sou...