North America's largest accredited model railroad museum.

This bronze statue commemorates the strange and beloved mascot of UC Irvine—the only university to be represented by a giant anteater.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

The only Leonardo Da Vinci painting in the Western Hemisphere.

This small hilltop church weaves the urban history of Washington, D.C. with the national history of the United States.

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

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

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

The "lovely red Vega" of the legendary record-settling pilot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

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

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

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

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

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Home to items never before seen by the public.

This house is a mosaic of tiled artwork sourced from local artists.

A giant Troll lurks under one of Seattle's oldest bridges.