This imprint of an old computer keyboard has a unique backstory.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This monumental mural crafted nearly 40 years ago is still in perfect condition.

A tunnel with windows, so you don't miss out on the impressive views.

Inside this church is an obscure piece of art carved by the famous Alice Liddell.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

This hulking behemoth is actually five interconnected towers built in the 1960s.

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

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

A sculpture of a famous ape who was once a beloved household name in London.

Abstract dinosaur models in London.

A relic of Victorian grandeur hides beneath a busy South London road.

The remains of Crystal Palace Great Exhibition of 1851.

An extensive collection of ancient Egyptian artifacts and mummies.