Lloyd’s Building

While the world’s leading insurance brokers are inside underwriting everything from astronauts’ lives to Taylor Swift's legs, people outside still stop to gawp at this famous inside-out building designed by Richard Rogers, one of the architects of Paris' Pompidou Centre. Completed in 1986, the stainless-steel ducting, vents and staircases are exposed on the outside for all to see. It's not open to the public.