This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

What happens when you cross a mayor and a painter?

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

The Pope’s secret escape route.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

Once a black market electronics marketplace, now an otaku shopper's paradise.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Be(w)ar(e) the moat around this historic Czech castle.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The "dragon babies" of southeastern Europe.

A dazzling temple featuring a towering 12-meter golden Buddha.

One of the world's steepest streets seems to have houses sliding down it.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

Monkeys lounge around at this 13th century temple.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.