A second generation sun-powered marvel lights up the night.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Will Geer's outdoor theater started as a mountain retreat for actors, musicians, and other artists who were blacklisted during the Red Scare.

A performance hall at the American Jewish University moonlights as a sci-fi film location set.

Come crisp December nights, this fairly plain neighborhood becomes a holiday dream world.

A 1950s Googie burger stand is now a Los Angeles landmark.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

A Gothic cathedral created from volcanic rocks.

Underground monastery and fortress.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

With over 10,000 lights, this engineering marvel lights up the city after dark.

Hidden beneath a washing machine in a fake kibbutz, this secret bullet factory has been preserved as a museum.

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

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

Natural arch offers panoramic views of Yangshuo's karst hills.

An ancient fortification lives on in this Chinese city.

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

Tracking the 1,500-year history of Korea's star cabbage.