It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The most powerful waterfall in all of Europe.

This stunning concert hall has become a symbol of Iceland's national recovery.

A winding, blood-red tunnel of hardened lava navigable by foot.

Climb right into the heart of this colorful Iceland volcano.

The hottest place on the planet.

A muddy alien landscape that is home to rare species of exotic plants.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.