World's second largest particle accelerator, where nature reveals its secrets.

A hundred-year-old museum filled with giant physics toys and experiments designed by grad students.

Where experiments are conducted on all things wood.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

More than 5,000 contemporary and "historic" mustards from around the world.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A special area of the National Archaeological Museum of Naples is located inside a metro station.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

The Bong-area park police have asked visitors to please, stop stealing the signs.

The oldest known university in the world is in Fez, Morocco.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Tour the oldest unrestored plantation house in America that is open to the public.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

The most decorated dog of World War I is preserved in the Smithsonian.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A place to eat for on-the-run agents and espionage enthusiasts.