The artwork mysteriously appeared within an Edinburgh cemetery.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

These narrow stone granaries have been used to store and dry out grain for hundreds of years.

There has been an astronomical clock on this spot since the 14th century.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

An ancient monastery, a locked room, and a mysterious book heist.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

The birthplace of the builder of the Statue of Liberty is now a museum dedicated to his work.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

One of the world's most complex timepieces.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

Beneath the city of Lourdes, France is a massive, concrete church.

The largest underground church in Europe.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."