Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

No one knows how many bodies are in this vault in a Chicago public park.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Cross the Continental Divide through an old railroad tunnel, and ride back to the top on a shuttle.

The largest outdoor art gallery in the Northwest United States.

Jail from the 19th century that was built by inmates.

Boise State's stadium was the first non-green football field in the world.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

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

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

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

Visitors to this museum will uncover a whimsical collection of marbles from across time.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

A brick-paved former section of the historic coast-to-coast highway.

Once a slice of Cold War-era military history, this museum is finding its future in the star.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

The largest collection of historical roller skates in the world.

Home to the world's largest quilt collection dating from the 1600s through today.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

This little gem of a museum is a hidden jewel filled with prehistoric treasures.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

Northern Kentucky’s very own Notre Dame showcases intricate stained glass and the bones of saints.