Known for the tunnel that leads visitors to the water.

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

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Have fun at the world's first Buddhist waterslide park.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

Few other hotels can rival the grandeur of the Castle in the Rockies.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

An intricately carved Viking church overlooks a glistening fjord.

Yugoslavia's biggest underground airport lies in ruins.

Peace Park and the Atomic Bomb Dome.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A Nesting Doll of Churches.

The remains of what was, not so long ago, the world's largest city.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A German apartment building hosting as many trees as human occupants.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

A remarkable geological formation resembling a forest made of stone.

Symbolic attempt to overcome the issues of life.