Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

The world's first ice hotel is still one of the most elaborate and beautiful.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

An emerald-green grotto just a short trip from Austin.

What is the Thing?

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A perfect turquoise lake colored with glacier dust.

Largest Kauri tree in New Zealand.

Handcrafted thermal spa washes away each night with the tide.

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

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

This strange geological landscape erupts with sudden bursts of water.

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

A wooden hut from the Heroic Age of Antarctic Exploration.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

An vast warehouse of everyday treasures in Berkeley, CA.

Concrete strongholds stand guard over the Golden Gate.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.