A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

An unassuming secret door once led to a legendary watering hole.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

Acres of natural wonders left behind by a socialite-turned-gardener.