Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

The fading, forgotten remains of a once bright and booming factory.

An artificial crater field that trained astronauts for lunar exploration.

This golf ball–shaped former desert real estate office now houses a UFO museum.

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

Rippling sand dunes frozen in the Arizona rock.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

Dramatic river bend surrounds a natural red-rocked pedestal.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

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

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

The sunlight passing through the opening of this huge cave system creates a magical effect.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

Windblown rock formations in an ancient Roman quarry.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

Haunting graffiti left by prisoners of the Spanish Inquisition.

The walls and streets of the ancient city are peppered with penises.

During World War II, this rice mill became a Nazi concentration camp.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

These delicate sand pyramids look like naturally occurring gothic spires.