Amazing, only Japanese can imagine & execute!!!!

Sapporo (A commercial city in northern Japan on western Hokkaido) stadium Seating capacity of 42,122, what's unique about this Stadium is that, it's an indoor stadium with the playing field out side, and when required, the field will move inside the stadium... and not only that, the field once inside it will rotate within its axis to ensure the spectators will get a all round view of the game being. So amazing!