At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

A historic freight system that found the true gold rush is in tourism.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

Gorgeous cave resemble a winter wonderland.

The ghostly remains of what was once the world's richest copper mine.

The king of U.S. high points towers over every other peak on the continent.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

A former taxidermist has turned his old shop into a folk art mecca.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

148 feet long and in the middle of a verdant forest.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

The honor of highest point in Michigan was almost given to the wrong peak before this mountain won out by 11 inches.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

This museum remembers an apocalyptic cult that became more famous for baseball than religious radicalism.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

This shallow cave got its name from copious amount of human bones found inside.

A museum dedicated to the dead and the tools used to usher them into the afterlife.