The other side is actually green.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

New Zealand's only running funicular railway.

The platform atop this verdant volcano was built with the help of a royal elephant.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

An exotic wildlife habitat right off The Strip.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The yawning maw of this pagan visage is said to bite off the hands of liars.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

Huge winged monument in the United Kingdom.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Home to three historic ships from the age of Vikings.

This chimerical bridge/tunnel appears to dead end right into the sea.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Swedish skyscraper with a 90° twist.

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

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

These Australian rock formations look like Martian beehives that have grown up out of the landscape.