These medieval skyscrapers dominate the skyline of this small Tuscan town.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

2300-year-old Roman road connecting the empire.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Go inside to really appreciate this 500-year-old technological masterpiece.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The once highest point in China blends symbolic design with a kick of adrenaline.

Hidden behind musical flora and forgotten for over a thousand years, this cave is now a neon dream.

Ming Dynasty necropolis raided during the Cultural Revolution.

A natural arch offers panoramic views of Yangshuo's karst hills.

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

The most famous location in China was home to whole dynasties worth of imperial rulers.

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

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

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

Houses are tucked between, on, and underneath giant boulders.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.