Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

This fantastical house shaped like a seashell brings aquatic design to architecture.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

Monks in the empyreal Alazani River valley have preserved their 1,000-year-old winemaking tradition.

An architect transformed this abandoned cement factory into his castle-like workshop.

Tibetan-influenced mountain fortress in Northern Pakistan.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This artful dam holds back a crater-made reservoir that can be seen from space.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

This whimsical stacked cabin looks like something out of a children's book.

An urban laboratory.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.