A display of magnificent stained glass windows is the first exhibit of its kind.

A Museum of Holography frozen in 1974.

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.

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

The palatial McDonald's that inspired Wesley Willis.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

This museum features the original car used on the Beverly Hillbillies sitcom.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

One of the world's earliest skyscrapers.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

One of few surviving standpipe water towers in the U.S.

This mosaic-covered bar is brimming with curated curios.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."