The spectators can see only the ground part of the building made of concrete and glass, 36 metres from the arena to the dome in height. There are five platforms stored 18m underground that swap in and out during a show: equestrian, illusionist, ice, water and luminous.
It takes only 5-7 minutes to substitute one arena for another. Equipment installed under the ground makes these quick changes possible. One arena is pulled down, moved aside and another is moved to the aperture and lifted up by a "gigantic hand'.