The largest ski jump in the Western Hemisphere hasn't hosted skiers in decades.

A larger-than-life version of the hat beloved by hunters, outdoorsmen, and Holden Caulfield.

Where experiments are conducted on all things wood.

A fitting attraction for the corn capital of the world.

An experimental, automotive replica of Stonehenge.

This collection of vintage signs reflects the long and colorful history of this Arizona town.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

A monument to the “unrecognized dead” of the tragic 1876 train crash.

The spectacular collection of one of the world's best woodcarvers.

Landmark dedicated to the plight of the American Indian in the 21st century.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

An abandoned asylum incorporated into a college campus.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

Wisconsin's most celebrated export gets the royal treatment on I-94.

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

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

A futuristic climate change study is nestled deep within this public land.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

The watery grave of an impractical idea.

Nicknamed the "Grand Canyon of the North," this open-pit mine in Minnesota has a much shorter history.

A memorial to the late U.S. Senator Paul Wellstone, who died at this location, along with seven others, in a plane crash in 2002.

"Where the ducks walk on fish."