Quite possibly the last cross all humans will ever see.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

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

Visitors to this library are in for a real-world education in modernist architecture.

The largest island on the great salt lake is home to curious creatures and strange stories.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

A Museum of Holography frozen in 1974.