This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

This American Sycamore was grown from seeds that accompanied the Apollo 14 mission in 1971.

A small burial ground honoring Native American veterans of the Revolutionary War.

A historic bridge no one is allowed to cross.

In the late 1990s, a mechanic and fan bought this iconic sportscar back from the dead.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The highest bridge in America was built for an almost unnervingly small amount of money.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."