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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

A walk through the historic city center, under the streets of Seattle.

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

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

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

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

A sulfuric martian landscape that looks far better than it smells.

The bears of Bern have been a city highlight for over 500 years.

A monument celebrating the idea of reaching inaccessible places.

A land of debatable treasure.

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

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Marta Becket's hand-painted theater in the desert.

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

The fairy tale castle of the "fairy-tale king."

Model Trains and Much More in Hamburg.

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

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.