These fantastically named natural pools look like something out of a Scottish myth.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This small museum in a 17th-century building honors three iconic Scottish writers.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

The remains of an ancient bathhouse sit inside this aptly-named pub.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This sculpture encompasses the emotion of rail travel.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A 36-ton remnant of the last Ice Age now resides amid picturesque vineyards.

The longest continuous lava tube in Oregon.