The world's largest rotating world.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The most powerful waterfall in all of Europe.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

One street divides a single town that stands in two U.S. states.

A monument marks the beginning of the longest north-south road in the United States.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Even in death, he's still your huckleberry.

A little-known hot spring haven right below the highway.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

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.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

Certain traditions prevail on the least-visited island of the Aran Islands.

One man's ambition created this psychedelic log home.

The largest earthwork effigy in the world.

Miraculous tree that seems to sprout out of solid rock.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

They squeal, they nosh, they look like predators.

In paradise, feral pigs have claimed an island all to themselves.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Native Americans built this circle of stones, which was used to predict astronomical events.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.