This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

A poetic monument to the Scottish Parliament.

Take a dip in the world's largest mineral hot springs pool.

Even in death, he's still your huckleberry.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

At the time of its completion, it was the tallest dam in the world.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

One man's ambition created this psychedelic log home.

The eerie ruins of this feudal fortress witnessed the execution of 60 conspirators in 1387.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

Plaques on its facade commemorate the Tiber's most destructive deluges.

One of ancient Etruria's most spectacular archaeological sites with impressive necropolises and rugged landscape.