A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Legends surround this jagged rock formation in the New Mexico desert.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A multi-storied adobe complex has been inhabited for more than a thousand years.

A toxic ghost town sitting atop a massive coal fire.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A singular collection of hand-built art deco cars are held in a building with style to match.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A science teacher's dream.

This striking art museum holds an amazing series of curiosity cabinets.

It would be a crime to miss it.

An art deco ice cream shop covered in vintage train station tiles.

This magnificent Cincinnati graveyard is also a popular public park.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

First planned industrial community in the United States.

The final resting place of the world's first nuclear reactor.