U WONT BELIEVE | ITS TRUE Engg Work | Amazing Mind Blowing Engg Work

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