A Roman-style column in Oregon hides a spiral staircase inside.

A vertically floating hemlock controls the waves and weather at Crater Lake.

A massive sea stack famous for its appearance in The Goonies.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

One of Cincinnati's greatest fighters once trained at a now defunct gym in this Over-The-Rhine neighborhood.

One of the few beardless depictions of Lincoln, George Grey Barnard's 1917 statue was denounced by many—including Lincoln's own son.

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

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.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

So many migrating birds roost on the bridge, it has a special summer speed limit.

North Carolina's only restored fort from the French and Indian War.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

One of the best places to see wild Colonial Spanish Mustangs in the United States.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

Known as the "Grand Lady of Jersey City,” the city's first racially-integrated hotel was owned by a preacher who was, depending on who you ask, a cult leader, civil rights pioneer, or the manifestation of God.

This haunting monument honors the victims of 9/11.

Featuring the the longest lift span of any vertical-lift bridge in the world.

On the Hudson resides one of the largest clocks in the world.

World War II bunker still standing on the New Jersey beach.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.