This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Houses are tucked between, on, and underneath giant boulders.

A vibrant colony of rescued wolves and other canids.

A home base for Judy Chicago, one of America's leading radical feminist artists.

Taos Pueblo recipes, foraged ingredients, and outdoor ovens define the menu at this eatery.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

Only ruined buildings and abandoned charcoal kilns remain of this once bustling Wild West boom town.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Dig for your own trilobites in this goldmine of invertebrates.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This gallery is home to everything from antiques, to ancient tribal masks.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

This enigmatic building features numerous architectural styles.

All that remains of this once-booming mining town are the ruins of a saloon.