Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

More than five miles of underground passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Visit this playground of waterfalls, caves and sinkholes.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

A strange house built only at night, with rumored mystic inspiration.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

Abandoned anti-ballistic missile base.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

Come crisp December nights, this fairly plain neighborhood becomes a holiday dream world.

An entertaining journey through the odd and strange awaits visitors to this shop.

From Japan to Italy, this California park explores the world's cultures through their gardens.