Urban decay is rife in today’s mega-cities and Tehran is no exception. The extent of damage to Tehran’s urban core is so substantial that the Ministry of Urbanism has extensively mapped the damaged sites in 14 of the city’s 22 districts. Mapping cities in the digital age however, is an on going and never-ending process of narrating, symbolizing, visualizing, and challenging a set of relations in an urban environment. GSS16-THR, in collaboration with local municipalities, will create an incision in Tehran’s urban fabric, identifying and investigating specific sites in need of rehabitiliation for public benefit. Students will investigate the phenomena of “thick”-mapping, and use algorithmic modeling tools, fabrication techniques (cnc, laser, 3D print), and mine depths of data available (from both sensor boards and pools of online information from municipalities) to us envision architectural proposals and installations for the betterment of Tehran’s forgotten lands. The propositions attempt to contextualize the citizen’s collective role as agents of change in Tehran’s urban fabric in what will forever be a work in progress.