A painfully obvious spy house sits right across the street from the Russian Embassy.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

Grave of the man allegedly responsible for a series of infamous murders in Boston in the 1960s.

A room hidden behind a swinging shelf in the children's section.

Alexander Milliner, a favorite of General Washington, is interred at Mt. Hope Cemetery along with 80 other Revolutionary War veterans.

An antique cemetery in New York, this land is home to any number of famed corpses.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

A short hike into the mountainside forest reveals a decaying 1890s town.

The remains of a deserted 1800s farming community can be found in Little River State Park.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

This colorful palace is an oasis of calm amid the hustle and bustle of the Buriganga riverfront.

An Australian lake whose pink hue defies scientific explanation.

Charlie Smith was almost certainly not 137 years old when he died, but why let that get in the way of a great story?

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

This peaceful gem in upstate New York was chosen as the future home of the 14th Dalai Lama's Library and Museum.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This candy-colored storybook village originated as a 19th-century Methodist campground.

Once the home of a hermetic monk, this cave now houses a small church.

A tiny church on a man-made island in the Adriatic.