The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

An ingenious way to immortalize the inventor of universal time.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

The most loyal of little dogs, or a Victorian era publicity stunt?

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

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

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

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

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

Eat the ultimate iteration of Portugal's most beloved pastry.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

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

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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

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

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

No building in the world leans as far as the so-called “Leaning Tower of Abu Dhabi.”

Whitewashed mosque contains the world's largest carpet.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Breathtaking and huge 430 year old maps of Italy.

Its collection highlights the monumental tasks undertaken to map Queensland.

A fortified palace in the shape of a ship on the Thiou river.