Beyond being incredibly fun, not much can be said about the Hole with certitude.

Entering this curiosity shop is like stepping into a mad scientist's lab.

A Wild West jailhouse that slid down the mountainside.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The world-record holder for the longest bridge stretching continuously over water.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

One of the only single-person private gravesites in New York City.

Visit the monolithic tomb of America's most famous general.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A bit of retro transportation flair preserved in the world's largest department store.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.