THE IMPOSSIBLE CITY is a Sawhorse Revolution program series that engages youth in building (and often designing) needed structures for Seattle's homeless encampments. As with all Sawhorse Revolution projects, the builds are guided by professionals in their fields - architecture, engineering, and construction. Each project is tailored to the needs of the camp and crafted to be of the highest quality, incorporating sustainable materials and building techniques, beautiful design, and a user-centered approach to architecture. Since the LIHI / Nickelsville Homeless Communities we work with move every 3-18 months, every structure we build is easily transportable and designed to fit the needs of homeless residents in transition to permanent housing. In brief, we work with a formal, independent, non-profit backed homeless encampment group - Nickelsville. Nickelsville comprises of a network of encampments in the Seattle area, all sitting on city-sanctioned land.