This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This abandoned subway station can still be seen on regular commuter trips.

During the holidays, a vintage subway train whisks New Yorkers back in time.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

This tribute to the founding father of the American dictionary originally contained a spelling error.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

A misunderstanding gave this 18th-century racehorse a most amusing name.

The nearly 200-year-old building displays a perplexing grammatical error.

This giant sculpture is both loved and disliked by the local community.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

A crumbling mountain resort that looks like it was abandoned in an instant.

Home of a French nobleman's short-lived attempt at raising cattle in the Badlands of North Dakota.

A mapping error in the 19th century made loggers think this section of the forest was underwater.

This remote desert watering hole has a connection to a curious chapter of American history.

This family-owned bakery is one of the last places in Brooklyn to sell the Nation of Islam–inspired bean pie.

An allegedly haunted mansion with a tragic, tawdry past.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A neighborhood park in the city of Cáceres hides what some believe are revolutionary examples of Neanderthal cave art.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

The 2,000-year-old pieces of metal are an ancient soldier's military discharge papers.

Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.

This mysterious artificial cave has long puzzled New Englanders.