On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

This iron building in the Amazon allegedly shares an architect with the Eiffel Tower.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A building so large that it has its own weather.

A tribute to Ponce de Leon's supposed quest for eternal youth.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

The ghostly remains of an accidental sea.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A vaudeville performer mounted this hollowed-out redwood log onto the chassis of a truck, and toured the country spreading a message of conservation.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

The largest known meteorite on Earth was too big to move.

Ancient artists in the middle of nowhere.

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

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The world's largest church atop a political fault line.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.