The number one stadium in the country, though, is Beaver Stadium, home to the Penn State Nittany Lions. Beaver Stadium may get this one by virtue of its sheer size -- its 107,282 capacity makes it the largest stadium in America and third-largest in the world. It's held more than 110,000 spectators for a single game, and on gamedays, State College, PA becomes the third-largest city in Pennsylvania by virtue of the influx of people.