Home to a 26-foot-tall statue of an American icon.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

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

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

The Real LegoLand.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

Enter the Forest of the Elves.

When waves crash onto this section of beach, the rocks sing a song.

Funhouse of found art and participatory sculpture.

20,000 pieces in a Frank Gehry-designed building.

These curious caverns have been home to mushrooms, gangsters, and disco.

Half of a waterfall goes into the river while the other half seems to disappear.

This large midwestern cavern features impressive rock formations and an underground waterfall.

This lab's maddening silence is good for business but bad for sanity.

An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

This set of hot springs also comes with fantastic views.

This historic Idaho island is home to a strange timeshare museum, a homemade mini-golf course, and an outhouse named Aunt Fanny.

Supposedly Satanic numbers adorn this preserved submarine sail.