If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

This abandoned fishing settlement may well be the greenest village in the world.

A scenic canyon with thick forests and historic ruins.

A fiery crater has been burning in the Karakum Desert since 1971.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

These spooky and unusual stone formations create an underworldly landscape.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.

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

The first declared National Monument in the United States.

Half of a waterfall goes into the river while the other half seems to disappear.

Curious cave that stays a cool 56 degrees all year long.