The Concrete Obstacle Course is located at the inactive Sibley Quarry in Fenton, Michigan. This center is a physically intense spatial experience that allows visitors to learn about the process of making cement for concrete. The slope-like spaces above and on the ground level are ten obstacles that show the process of making cement; quarry, crusher, mixing bay, raw mill, preheater, rotary kiln, clinker, silos, bagging, and dispatch. The level below includes offices, a welcome center, a suit-up room, bathrooms, a cafe, and a cliff viewing platform.