Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A hip bar decorated with walls of golden skulls.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

The real-life site of Ichabod Crane's infamous gourd attack.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The oldest continuously occupied public building in the United States.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

"I did this all while you were watching TV."

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Friction between grains of sand cause a curious "singing" sound.

The fifth-longest natural arch in the world, and the longest outside China.

An antique store houses the last operational diner from the defunct department store chain.

Inside this clubhouse is a cinephile's paradise.

A Saint Nicholas-themed ghost town in the Mojave desert.

A former department store turned into a quirky restaurant.

One of the largest, oldest, darkest, quietest motel rooms in the world.

A house carved into a rock in the 1940s.