A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

A scattered trail of street art adds a pop of color to the city's stark structures.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

An American ghost town hides along a side street in Scotland's capital.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This series of Scottish caves has no clear purpose other than baffling historians.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

This small-town Connecticut restaurant gives each diner a free book from its vast library.

A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

A fire station-turned-church-turned-museum dedicated to the work of seminal light artist Dan Flavin.

An eccentric playboy's astounding natural history collection.

The graves of a Connecticut family thought to have been plagued by a vampire.

A distillery built on (and above!) mobster Dutch Schultz's Prohibition-era underground moonshine business.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

This forgotten graveyard in rural New York State once served a pioneering hospital.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.