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

This natural sea cave hides a small wonderland of natural turquoise beauty.

Limestone caves with spectacular showcase chambers.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

Roman ruins top white travertine terraces formed by ancient hot springs.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A massive sea stack famous for its appearance in The Goonies.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

A gargantuan crystal kingdom.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

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

The most powerful waterfall in all of Europe.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."