The US Embassy, London, applying for a visa. It’s a brutalist slab of architecture that’s says ‘Do not come in, you are not welcome’. On the plus side, it was used in the filming of the 1976 classic The Omen, where it doubled as….. er… the US Embassy. Gregory Peck played Robert Thorn, US Ambassador to the UK and adoptive father to the Antichrist. I believe that was actually the official job description.