Chicago - John Hancock Center

The John Hancock Center, an 1125ft/343m high tower tapering towards the top, which has something of the appearance of a pit winding station, was completed in 1970 to the design of the renowned SOM firm of architects (architect B. Graham, constructor F. Kahn). Its cross-braced steel structure has a facing of oxidised aluminium with a slightly reflective surface. There is an observatory on the 94th floor with magnificent panoramic views. Two 345ft/105m high telecommunications aerials are found on the roof.

The building contains a variety of shops, offices and apartments. It's plaza features sculptures, waterfalls and seating which attracts people.