A labyrinthine underworld of tunnels and caverns hides beneath the city.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

The oldest inn in England served brew to the crusaders.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

An artistic tribute to the famous singer, just around the corner from where he was born.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A hands-off space for graffiti artists to hone and display their skills.

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

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

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A student driver's nightmare.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A kaleidoscopic warehouse-maze of handmade neon signs.

The Andean town where every single building is decorated with a brightly colored frieze.

An explosion of natural color known as "the river that ran away from paradise."