Old Danish castle immortalized in Shakespeare's Hamlet.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Rippling sand dunes frozen in the Arizona rock.

A Saint Nicholas-themed ghost town in the Mojave desert.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

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

"Only the devil could play golf here."

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

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

Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.