A network of concealed passageways lies within a busy London Underground station.

This 1920s Dutch barge is now a floating bookstore.

Dictionary Johnson’s favorite feline.

The final resting place to 300 Victorian-era pets hides inside the city park.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A mysterious artist-run cabinet of curiosities and library.

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

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

This South London cemetery holds the remains of more than 15,000 people.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A kaleidoscopic warehouse-maze of handmade neon signs.

A collection documenting Nazi occupation of Norway, including a painting believed to be made by Hitler.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

This floating sculpture of ice is a poignant reminder of nature's power.

The world's largest moose statue towers above the highway between Oslo and Trondheim.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

A reconstructed farm shows what life was like in Norway 1,500 years ago.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

World's strongest whirlpool.

Tens of thousands of tiny bottles stuffed with various items.