Global in scope and transdisciplinary in method, this work examines the process through which local historic landscapes become global heritage sites. The Valtellina, a valley in the Italian Alps, is known for being unusually fertile for its elevation and latitude, and for the dry stone terraces on its steep hillsides that make this fertility possible. ProVinea, a local nonprofit, has applied to UNESCO to inscribe these landscapes onto its World Heritage list, representing the construction and use of the terraces as the heroic transformation of barren slopes into fertile fields. Drawing on...