The Milky Way's dust is of basic importance in astronomy. It is both crucial to the formation of stars and a pervasive observational nuisance. Despite the dust's importance, existing dust maps are largely limited to two dimensions, with the distance to the dust unknown. The advent of large surveys like Pan-STARRS1 has allowed us to map dust in three dimensions in unprecedented detail. In this talk, I will describe how we use observations of stars in the Milky Way to map dust, and I will discuss three major results: a catalog of distances to major molecular clouds, the discovery of a 100 pc ring of dust in Orion, and the 3D dust map itself. Upcoming surveys promise continued scientific returns: Gaia, DECam, and the LSST will provide more precise and deeper data than ever before, enabling unique maps of the Galaxy's spiral structure and the study of the dust's properties in 3D.