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

It was once the base for a series of domestic terror attacks.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The tunnel under the Capitol Building where Congress takes out its trash.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

This taxidermy horse was a Civil War hero.

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

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

A line of blue paint marks the route of the inaugural parade.

This unassuming passageway played a key role in one of the most important events in U.S. history.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

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

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