The Masonic of Detroit , Detroit

The largest Masonic Temple in the world, this ornate 14-story building opened in 1926. For decades its 5,000-seat, acoustically rich and intimate auditorium served as Detroit's choicest venue for concerts, opera and plays. Now that it has plenty of competition, the auditorium hosts only sporadic events. The impressive building has 1,037 rooms, including ten decorative period lodge rooms; a Scottish Rite Cathedral that seats 1,600 people and has rich ceiling carvings and colors; and a 17,500-square-foot drill hall with a floating floor laid atop felt cushions. It's a Detroit landmark.