Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

The above-ground crypts at this Catholic cemetery face north-south instead of the usual east-west.

The silent film master's legacy commemorated in all the right and wrong places.

This institution celebrates the happy accidents of uncommon sticktoitiveness.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

Many of the murals covering this sleepy Florida town hide some sort of intentional error.

A ruined Maya city that suffered a years-long case of mistaken identity.

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

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

These particularly resplendent rodents are the state animal of Maharashtra.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

An homage to everyone's favorite prehistoric cartoon family.

This space age health spa looks like a supervillain's lair.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The birthplace of a titan of American cinema.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.