Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This coffee shop lies hidden beneath a historic church.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

Banksy gives themself artistic license with this piece of London street art.

The broken skateboards that became a poignant memorial to a murdered skater.

Public access to clean drinking water was an instant hit among the masses.

This hidden green space is the city's second largest conservatory.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

It's a mystery why these remains were found with no traces of their bodies in sight.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

Preserved behind glass, the ruins of a medieval building used to store human remains.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Rebuilt remains of a temple to Roman god Mithras.

A collection of machines designed to break things for science.

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

These Victorian era devil sculptures were designed to spite a local vicar.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This unassuming building produced some of the world's most famous bells.