A church of bones, decorated with 40,000 human skeletons.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

View the California coastline (and the home of Barbara Streisand) inch by inch with stunning, government-sanctioned aerial photography.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

Minimalist modern art on a repurposed military base in rural Texas.

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

Thousands of well-dressed mummies below a monastery.

An alchemist's "magic door" stands in the middle of a Roman park.

Go inside to really appreciate this 500-year-old technological masterpiece.

A museum dedicated to a sea that should have never been.

Michael Heizer's masterwork in the Nevada Basin.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Dramatic river bend surrounds a natural red-rocked pedestal.

Mysterious painted skulls in Moravia.

The personal charnel house of Anton Bruckner.

Artfully arranged bones of 5,800 Austrians.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Charnel house at the foot of Mount Sinai.

The rocks in this arid basin leave trails of movement behind them.

Odd outsider art installations surround a Gold Rush-era ghost town.

Ancient human, animal, and geometric figures drawn in the earth.

Giant nude woman of Tijuana is also the artist's home.