This luxury shopping lane has been protected by its own tiny police force for over a century.

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

This massive blockhead sculpture hides an entire library.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

This former big box store has been reimagined as a massive public art space.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

A unique collection of Science Fiction, Fantasy, and everything in-between.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

The runoff from these fiery cliffs sends red water flowing into the sea.

This Costa Rican chapel is the most metal church in the world, literally.

This abandoned hospital is one of the most haunted places in Costa Rica.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This urban oasis is a marvelous meld of music and landscape architecture.

This half-ton piece of the Alps sits at the base of the CN Tower.

The giant birds honor two native North American species.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

Folklore and history carved into Brittany's coast.