Based on Robert Macfarlane's bestseller, Underland is a cinematic voyage beneath the surface of the earth.

Based on the bestselling book by Robert Macfarlane, Underland is a cinematic documentary that voyages into worlds rarely glimpsed by human eyes. Beginning in the shallow soils beneath an old ash tree, the film follows several ‘astronauts of the underworld’ as they travel into ancient sacred caves, flooded storm drains, melting glaciers, underwater burial chambers and a deep underground laboratory built to solve the mysteries of the Universe.