This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

Legs Inn provides Polish food, a cornucopia of Odawa artwork, wood carvings, and mounted deer heads.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

This shallow cave got its name from copious amount of human bones found inside.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Strange physical sensations and optical contradictions keep visitors coming back for more.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

A rusted metal giant pays tribute to Birmingham’s industrial past.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

An enormous, inside-out glass globe built in 1935.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

Bronze statue marks the spinach capital of the world.

A large stone map of Arkansas awaits visitors to its highest point.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This massive World War II calculator hearkens back to the days when "computer" was a job title.