An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Remote ruins of a 2,400-year-old Iberian settlement.

An ancient tower built during Roman times as a lookout post still stands to this day.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

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

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

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

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

This institution celebrates the happy accidents of uncommon sticktoitiveness.

The two-cell building in Nebraska was briefly owned by a teenage boy and then a Hollywood dummy.

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

This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

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

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

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

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

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

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

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

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

A misnamed well, with a deep dark past.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The remnants of a creative early method of wildfire prevention.