You have to see it to believe it!
It is a 250m long and 20m high steel wall, suspended at 5 metres from the ground that sways as if it were as light as clothes flapping in the wind!!!
It is a huge mobile screen on which images can be projected, and acts as stage for the great Agora square. This is the wall of nations, another great work of art not to be missed, designed by Calatrava.