While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The king of U.S. high points towers over every other peak on the continent.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

Largest Roman Catholic church in North America.

This grand gothic brewery has been pumping out suds for over a hundred years.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

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

This nine-story building is the oldest standing skyscraper in D.C.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

The national park was once a plantation estate.

There's a crumbling old mansion inside the Smithsonian National Zoo.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Obscure Freemasons still live in D.C.’s largest private residence.

The oldest house in Washington, D.C. wasn't originally constructed in the nation's capital.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

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

A wonderland of folk art including the World’s Largest Grit. 

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

Georgia's highest point was given its strange name thanks to a simple translation error.