Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Abstract dinosaur models in London.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

The huge golden reliquary of a testicle-smashing saint.

A quiet memorial to those who died saving others in the heart of the City of London.

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

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

A chapel on a volcanic core, marking the end of a successful journey.

Natural mummies hidden in the crypt of a medieval French church.

A luxuriant botanical garden below sea level.

A popular day's outing in Bovington consists of watching military tank driving practice.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

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

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

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.