Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Remnants of a storybook amusement park hidden behind a strip mall.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

There’s a hidden military meme engraved on the World War II Memorial.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

The 28,000-year-old specimen is remarkably intact.

The first memorial dedicated solely to the Black troops who fought for the Union.

Look closely and you’ll notice that the color changes a third of the way up the tower.

An overlooked memorial honoring the local Washington residents who died in World War I.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

There’s a special club house at the top for the bell ringers.

Washington's iconic carousel has a nice piece of Civil Rights history.