10 Adam Street

The lowdown

Tucked into the Adelphi, the elegant Georgian quarter near the Strand designed by the celebrated Adam brothers, is a glossy black front door that does an uncanny impression of the most famous address in Britain. With its similar fanlight, lamp, lion's-head knocker and black-and-white step, 10 Adam Street is often mistaken for, and sometimes used to stand in for, Number 10 Downing Street.

It is a genuine private address, a fine surviving example of the Adam brothers' refined design, rather than a deliberate copy. It is free to admire from the pavement, a fun little doppelganger to seek out on a walk through one of London's most graceful and overlooked corners.