The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

A six-story-tall golden pyramid, surrounded by a moat.

A bizarre house filled with an astounding array of collections.

The center of the only hemisphere that awards visitors with a commemorative coin.

This striking art museum holds an amazing series of curiosity cabinets.

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

A large circus museum with summer performances.

A museum celebrating the self-taught artist-environment builder.

This solitary gravestone is separated from the rest in Appleton, explaining why local legends continue to surround it.