Imagine that you're standing under a gigantic inverted wooded bowl having a diameter of 535 feet - that's over one-tenth of a mile, just 64 feet short of two football fields laid end to end. Look up 156 feet to the ceiling (equal to a 14-story building). For those who love the beauty of wooden construction, this a sight to behold. The clear-span interior is constructed to 871 Douglas fir beams with a covering of 108.5 miles of fir decking. This is a description of the Superior Dome, the world's largest wooden dome, at Northern Michigan University in Marquette, Michigan

Total floor space (over 5 acres) was designed for versatility, with a 200-meter, six lane track and playing surface for several sports. For football, soccer, fild hockey, etc., the world's largest piece of movable artificial turf can be mechanically rolled upt to completely cover the play surface.