Bohol's mysterious brown hills.

This small group of sand dunes manages to pack in a strange rainbow of colors.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

Tubing through a cave lit with glowworms is a magical underground experience.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

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

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

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

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

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

The longest hedge maze in the world.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The tallest residential building in Africa is an unsettling Brutalist monolith.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

An enormous concrete structure built over a nuclear crater.

Because sometimes the most efficient route from A to B isn't a straight line.