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

A tiny museum dedicated exclusively to the tiny art that decorates matchboxes.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

This concrete sculpture features a woman opening her heart to showcase a beautiful fern.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Natural time capsule containing an alien ecosystem.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

A series of playful yellow penguins share a serious message about the environment.

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.

A unique attraction and museum dedicated to exploring iconic roadside structures.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

The world's third-largest scale model of the planets.

World's second largest particle accelerator, where nature reveals its secrets.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

A cemetery housing wild west legends in South Dakota.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

The face of the famed flier in a hillside in her hometown.

The first home of the doomed aviatrix Amelia Earhart.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

An Englishman loses his scalp to a Cheyenne warrior and lives to donate it to a library.