Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

A cluttered and astounding collection of antiquities and curiosities.

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

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

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

A calm and comfortable place to hang out with cats and kittens up for adoption.

This innocent-looking townhome is actually a subway exit.

Lie in a hammock where George Washington stood.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

A very classy 1920s-era bar right in Grand Central Station.

Elevated freight railway turned wildly successful urban park.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A living time capsule of the 1960s Richardson Bay water-front.