A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

This one-time health resort was used by aristocrats around the world.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco's first World's Fair, dedicated to the wonders of California.

The platform atop this verdant volcano was built with the help of a royal elephant.

New Zealand's west coast is one of the best places in the world to view these large seabirds.

Handcrafted thermal spa washes away each night with the tide.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The "punniest place on Earth” has nearly as many bull-themed puns as it does people.

This unusual rock formation looks like an apple that has been neatly sliced in half.

This strange geological landscape erupts with sudden bursts of water.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

Highly spherical boulders on the shores of New Zealand.

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

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

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

This black church sits alone among a field of lava rock.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.