The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This structure among the trees was the result of divine inspiration.

America's most famous piece of self-built architecture.

A museum in a law office, filled with authentic and counterfeit goods.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

A 140-year-old castle with underground caves hidden in San Francisco.

Playable, historic pinball machines fill this Alameda museum.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The tallest bronze seated statue of the Buddha in Japan.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

A white Buddhist temple with a golden restroom.

This Scottish bridge seems to compel dogs to leap to their death.

This Tang Dynasty behemoth is the biggest Buddha in the world.

One of the world's most complex timepieces.

A stone wall that mysteriously moved three feet from its foundation.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The restored and active Victorian-era final resting place of San Francisco.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.