Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

This historic train station has been converted to a locomotive themed hotel.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Little Red Lighthouse under the George Washington Bridge.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A bit of retro transportation flair preserved in the world's largest department store.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

All that remains of the once-booming chain is a single orange-roofed restaurant.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The unbelievably opulent home built for an infamous newspaperman.

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

This church on a Tohono O'Odham reservation has stood since 1797.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A failed piece of Orientalism has become the proud symbol of a community.

A building so large that it has its own weather.

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."