The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Once America's tallest structure, now a Baltimore landmark.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

A museum dedicated to exhibiting remarkable outsider art.

A winding district gerrymandered into the shape of a mantis.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This statue honors the author's groundbreaking family story.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The ghostly remains of an accidental sea.

Limestone caves with spectacular showcase chambers.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A historic lighthouse steeped in rumors of ghost and pirate stories.

Step inside Lucy, the world's largest "elephant."

The rusting remains are visible sticking out of the waters of the Delaware Bay.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

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

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

Famously misunderstood wonder of the ancient world

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.