Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

Sip creative cocktails in the former vault of the Riggs Bank.

Press 1 for knock-knock jokes.

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.

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

This groundbreaking 16th-century map is known as "America's birth certificate."

Mysterious installations bring levity and light to a sometimes stodgy city.

A secret greenspace hides atop a Capitol parking garage.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

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

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

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

Corn-inthian columns with a uniquely American take on neoclassical architecture.

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

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

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

Where you can hail your favorite fictional commanders-in-chief.

Also known as the Founding Church of Scientology.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

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