A rare kind of blue bear can be found chiefly in the national park that shares their name.

Four-story concrete hotel never opened to customers.

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

Gorgeous cave resemble a winter wonderland.

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

This whimsical stacked cabin looks like something out of a children's book.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

This botanical garden has been nicknamed "Alabama's Little Corner of Greece."

This 880-acre facility is home to a massive collection of vintage motorcycles and cars, as well as a 2.38-mile race course.

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.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This ghost town houses the remains of Alabama's old state capital.

Tucked away atop a quaint Alabama pharmacy is this tiny display of antique medical tools.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

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.

One person's lost luggage is another person's treasure.

The location of the pie company that gave a classic toy its name is now a parking lot.

This factory made "health corsets" that were a step towards liberating women's bodies.

This strangely amalgamated museum explores the history of the Timex clock company as well as archaeology.