Deep in the Ocala National Forest, a lonesome 19th-century grave.

This 19th-century performer's gravestone identifies her as "the smallest woman ever in this Kingdom."

The last early 20th-century schoolhouse in Fairfax County has galvanized the community and engendered a spirit of service among residents.

This bell is one of the last remnants of the lost city of Triadelphia.

The only one-room schoolhouse remaining in Talbot County, Maryland.

A well-worn trail through thick woods in northern Montgomery County leads to an old schoolhouse.

These ruins of an octagonal stone school that was later used as an A.U.M.P. church exemplify a popular school design from the 1830s.

The oldest existing one-room brick schoolhouse in Loudoun County.

The grounds of this Catholic boarding school are said to have inspired Arthur Conan Doyle and J.R.R. Tolkien.

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

A library where thousands of books explain how to avoid another Great Recession.

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.

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.

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

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

A late 18th-century jail.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

Visitors to this museum will uncover a whimsical collection of marbles from across time.

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

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

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