Nearly 1,000 years old! Built by William the Conqueror as a fortress, later a royal prison, execution site, and home to the Crown Jewels (and the ravens who, legend says, protect the kingdom).

London's most famous bridge! Its Victorian bascules still lift for river traffic to this day.

Western Europe's tallest building when it opened in 2012. A glass spike over a city that spent 2,000 years staying low to the ground.

Not the famous one, but a crossing has stood here since the Romans first founded the city. The medieval version was lined with shops, houses, and (grimly) traitors' heads on spikes.

Christopher Wren's column marking the Great Fire of 1666. Its height is exactly the distance to the bakery on Pudding Lane where the fire began.

"The Walkie Talkie"! A modern skyscraper with a genuinely wild claim to fame when, in 2013, its curved glass front concentrated sunlight so intensely it melted parts of a car parked on the street below. London's most infamous architectural mistake.

Founded in 1571 as London's first proper trading floor, modelled on Antwerp's bourse, look up for the grasshopper weathervane, the crest of the merchant who built it. Now luxury shops sit where traders once haggled.

The "Old Lady of Threadneedle Street". Britain's central bank since 1694, and the vault holding one of the largest gold reserves on Earth.

Wren's masterpiece, and the building that stood defiant through the Blitz while the rest of the City burned around it.