This museum honors the composer of “Swannee Ribber.”

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

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

One of the first Second Empire-style buildings constructed in North America.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Largest Roman Catholic church in North America.

The United States Capitol's former columns still stand.

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

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.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

The hippo that stands on this university campus was once a drunken flea market purchase.

FDR's Art Deco hospital tower was hopelessly inefficient.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

This beloved marketplace mascot poops money and grants good luck.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

Garments from across the globe call this hidden gem home.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

The first museum in the U.S. to address human rights issues in China.