This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

A one-stop shop for all things snowmobile, started by a snowmobile-obsessed group of friends in Wisconsin.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

A unique botanical garden housed in three giant geodesic domes.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

Statue dedicated to the star of an old television show.

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

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Only known mainland rookery of the threatened Stellar sea lion.

On the Oregon coast is a natural hole that seems to be draining the sea.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Two massive rock outcroppings on the Oregon coastline.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Less a museum than a bizarre fantasy world created by artists and engineers.

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

A Memphis park where you can walk the whole Mississippi River in one go.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Home to drunken tower-climbing goats... seriously.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A display of magnificent stained glass windows is the first exhibit of its kind.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.