Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The steepest classic funicular in the world glides along a dizzying incline.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

The Twisted Trees of Alticane are an unnerving grove of Quaking Aspen, apparently mutated from a single source, giving them a twisted and unnatural appearance.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

A remote island holds what claims to be Scotland's smallest cinema.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This research hub in the Amazon Rainforest is perched amid one of the world's most biologically diverse landscapes.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A remarkable geological formation resembling a forest made of stone.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

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

This small uninhabited island offers Galapagos-like biodiversity.

This gallery of prehistoric red ochre art lines the wall of a scenic segment in Utah's San Rafael Swell.

Every year locals give the bear a fresh coat of paint to preserve its signature goofy grin.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

This bridge provides safe passage for squirrels.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

This ancient oak tree plays matchmaker for singles willing to branch out from the usual dating scene.