These abandoned waterworks are crumbling into the Potomac River.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

Local legend says the remains of Father Christmas lie within the medieval grounds.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

The oldest inn in England served brew to the crusaders.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

A series of five defunct panopticon prisons in Cuba.

One man's extraordinary topiary garden in a small South Carolina town.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

The largest self-built castle in the U.S., six decades in the making.

The television series' iconic giant foot was borrowed from this classical painting.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

The underground hideout of a Japanese soldier for whom World War II ended in 1972.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A silly medieval mural preserved on the side of a Viennese house.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

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