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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This arch was featured prominently in the film.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

The highest point in Virginia can only be reached by passing through ponies and flowers.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

An oddly conical beacon perched atop beautiful Irish cliffs.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

A standing relief of a Norman knight whose posture marks him as a Crusader.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

The ruins of a medieval monastery named after a type of tree.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

This is why we can't have nice things on the Incan Trail.

It took 82 years and four different plaques to finally get the story right.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.