This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

This steamer is known as "The ship that built Cleveland."

The only presidential monument to display a late POTUS's actual casket.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

This smily stone feline is meant to represent a mythical lion that almost destroyed the island of Kea.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

Perhaps the most scandalous statue of America's first president.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

The most decorated dog of World War I is preserved in the Smithsonian.

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

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

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

There’s a hidden military meme engraved on the World War II Memorial.

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

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The rogue roots are gradually consuming some of the historic marble grave markers.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.