In "Underland," Robert MacFarlane embarks on an extraordinary odyssey into the Earth's hidden depths, weaving a tapestry that blends myth, literature, memory, and the very fabric of the land. This journey is not merely geographical but a profound exploration of the spaces beneath our feet, from the ancient art adorning Norwegian sea caves to the icy heart of Greenland's glaciers, and even further into the engineered depths where humanity seeks to bury its most dangerous legacies for millennia. MacFarlane's narrative is a mesmerizing blend of storytelling and scientific inquiry, guiding us through the dizzying scales of geologic time and inviting us to ponder our place in the vastness of Earth's history. "Underland" stands as a testament to MacFarlane's lyrical prowess and deep-seated curiosity about the bonds that tie us to the underfoot and the underthought. The book challenges us to look beyond the surface, to uncover the dark, often unseen layers of existence that support and sustain our lives. Through vivid descriptions and an unwavering sense of wonder, MacFarlane illuminates the underworlds not as places of fear or oblivion but as realms rich with mystery, beauty, and the potential for understanding our world in transformative new ways. In doing so, "Underland" not only alters our perceptions of the planet but also speaks powerfully to the pressing environmental and philosophical issues of our time.