A large circus museum with summer performances.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

First planned industrial community in the United States.

Illegal drag racing two stories beneath Chicago’s streets.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This historic hotel invented the chocolate brownie.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

To find the "unicorns of the deep" you've got to go downstairs.

Where dioramas can follow you home.

Years of archaeology, just chillin' by the water cooler.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

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

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

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

You thought Santa Claus didn't exist, but it turns out you were wrong.

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

World's largest Christmas store.

The park is home to the United States's only still-operating Dutch windmill.