Lights are projected on the walls of Brady's Bend Underground Storage, a limestone mine that supplied much of the cement that built the city of Pittsburgh during the first half of the 20th century, during the SubSurface: Site Specific Sight & Sound arts festival on Saturday evening, Dec. 2, 2017 in East Brady, Pa. The project featured students and faculty from Carnegie Mellon University's College of Fine Arts, as well as the Integrative Design Arts and Technology (IDeATe) Network. Read more about the program in the Pittsburgh Post-Gazette.