This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This hidden art nouveau gem was designed by an architect in search of a national style.

Electrical curiosity museum housed in an old transformer station.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

The ruins of a medieval seminary some say is the oldest university site in Scotland.

FIFA deemed this isolated field one of the most remarkable places to play the sport.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

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

Huge winged monument in the United Kingdom.

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

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

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

A poignant memorial shows the widows and children left heartbroken by the worst fishing disaster in Scottish history.

Largest lake in Great Britain measured by surface area.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.