This Idaho state park boasts the tallest single-structured sand dune in North America.

A former sanitarium where soldiers were sent to recover in the healing waters of hot springs.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

A miner's handmade folk art fountains are tucked in the woods off a multilane highway. 

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.

Rare and gorgeous birds abound in this protected wildlife sanctuary.

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."

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

This set of hot springs also comes with fantastic views.

The largest outdoor art gallery in the Northwest United States.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

A black cottonwood gets a second life as a home for books.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

Home to the deepest rift anywhere on Earth.

Natural rock water slides hidden in the remote forests of northern Idaho.

A sacred mountaintop temple offers a fine cup of tea to visitors who can survive the journey.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

The building that inspired Shirley Jackson's "The Haunting of Hill House."

One of the oldest cemeteries in Vermont is the final resting place of soldiers, politicians, and a famous author.