This elaborate towering structure was once famed for its revolutionary height.

A rock and sand industrial site returns to its natural habitat.

The Teenage Mutant Ninja Turtles stop thieves at the site of a historic 1876 bank robbery.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

The (fictional) address of Sweeney Todd's bloody barbershop.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

An unusual round church in London with a Templar past.

This London marker celebrates the spot where the world-famous English band was founded.

Eighty million natural history specimens call this gargantuan museum home.

An architectural oddity hides in plain sight on this iconic London bridge.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

This sculpture encompasses the emotion of rail travel.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The first keystone arch railroad bridges constructed in America.