The land is home to swimming ponies and a legendary 18th-century treasure.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

Home of the only civilian casualty at the Battle of Gettysburg.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The romance of early commercial flight still fills this Art Deco destination.

At 207 feet, one of the world's longest continuous escalators.

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

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

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

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.