Underland (book)

Underland: A Deep Time Journey is a book by Robert Macfarlane and the sequel to The Old Ways: A Journey on Foot. Initially published in English on 2 May 2019 by Hamish Hamilton in the UK and on 4 June 2019 by W. W. Norton & Company in the US, the book has been translated into over a dozen languages. An audiobook, read by Matthew Waterson, was also released in June 2019 by HighBridge Audio.

The book is a descriptive journey by the author of different subterranean landscapes that he explores, including caving in the Mendip Hills, the Catacombs of Paris, the Karst Plateau, an underground laboratory for detecting evidence of dark matter, and descending into a glacier's moulin among other explorations. These underground spaces represent "burial and unburial and deep time." Through these underground journeys the book sheds light on the impacts and consequences of human actions within the Anthropocene geological epoch.