High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

A pocket of jungle amidst urban expansion in Panama.

Sloth rehabilitation center in the jungle of Costa Rica.

A crumbling cathedral condemned by an earthquake.

Guatemalan womanizer, venerated during Holy Week.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A little sculpture with a large wardrobe.

Constructed on the ruins of a convent, this tower saved countless lives.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Macabre astrological automaton clock dating to the late 1400s.

Swiss vineyards in a UNESCO heritage site.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Where Venice's gondolas go for a tune-up.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

This uniquely designed bridge served as the city gate for Comacchio.

This massive subterranean fissure is known as the "underground Grand Canyon."

Over the dunes of the Empty Quarter, the mysterious music of the desert.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

One of the most photographed locations in the entire city.