Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

A monument to a survivor of harsh pioneer life, frostbite, and primitive surgery.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

Eat burgers beneath gargantuan taxidermy and thousands of dollar bills in Utah's oldest continuously-operating bar.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Step into the cool deep past and unknown future of who begat who.

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

Incredible sculptures inspired by obscure passages from the Bible.

A sculpture for the sun and stars, created by Nancy Holt.

Dig for your own trilobites in this goldmine of invertebrates.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This graveyard is the eternal home of many brave pioneers who settled the Great Northwest.