A subterranean playground in an abandoned slate mine.

The largest known medieval map of the world.

Beasts and branches swirl in sandstone carvings, interrupted by one strange creature.

The oldest working Brewery in Britain.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Traveling collection of amazing automata.

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

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

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

The anatomical-pathological collection of a man who changed surgery.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The television series' iconic giant foot was borrowed from this classical painting.

London's smallest police station is barely the size of a phone booth.

A massive underwater sinkhole made famous by Jacques Cousteau.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

More than 8,000 drinking jugs say “Cheers!” to a guy named Toby.

A butcher shop in Minneapolis has all the meats and cheeses you’d expect from any of its kind—except that all the products are vegan.

One of Frank Lloyd Wright's final works was this UFO church.