The Stereoscopic Picturesque is an interdisciplinary study of nineteenth-century 3D photography and its relation to the picturesque tradition in art, literature, and tourism. The study focuses on the invention of the stereoscope, originally a laboratory device for demonstrating the nature of three-dimensional vision, and the simultaneous invention of photography, in order to show how early stereo photographers used the optics of the stereoscope to extend the possibilities of picturesque representation. Their images also made “virtual travel” possible for an international mass audience, allowing millions of people to explore places and natural wonders that they would otherwise never have seen. Many of these places had deep literary associations – Wordsworth’s Lake District, for instance, or Scott’s Trossachs – and the stereography of these regions constitutes an important, yet largely unexplored, chapter in the reception history of these authors. Many of the photographs were deliberate attempts to encourage the preservation of environmentally sensitive sites, something the realism of photography and the 3D presentation of the stereoscope made especially effective. The Stereoscopic Picturesque combines fields of study that have rarely been brought into such close contiguity: the history of science, art history, the history of photography, literature, and environmentalism. The result is an unprecedented look at Victorian popular culture and the way stereo photography shaped their ways of seeing the world.