Cryptic messages embedded in the New York City sidewalk.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

The best Tiki bar in Las Vegas.

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

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

Half of a waterfall goes into the river while the other half seems to disappear.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

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

The world's longest known cave system.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This landmark cemetery in Boston was created more than 300 years ago.

An underground magnet for ever-changing street art.

A magical place that lets you play in and explore the world of Studio Ghibli.

Hot springs monkey spa in the middle of Hell's Valley.

Dramatic river bend surrounds a natural red-rocked pedestal.