The 20-mile causeway that separates the Netherlands from the sea.

Not many houses move across borders, this one did it twice.

This residence straddles a border between Belgium and the Netherlands.

This building once stood at the center of a butter war.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

A tribute to smugglers and the Butter Wars.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

This is Bremen’s oldest historic district, famous for its labyrinth of narrow medieval alleys lined with tiny, colorful 15th-century houses that resemble beads on a rope.

A priceless collection of the Nation's cryptologic history.

One of America's oldest continuously operating hotels offers a blend of rich history and historic architecture in the heart of Annapolis.

The whole world in one water tank.

An eponymous directional signpost erected by the first president of the United States.

Every Friday night, Appalachian string-bands turn this country store and soda fountain into a raucous jamboree.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The oldest hotel in West Virginia is reportedly frequented by ghosts.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

The 25th President's marble casket can be visited in this classical Ohio tomb.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

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

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.