No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

This archaeological dig site and museum is home to one of the largest dinosaur fossil collections in the world.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This canyon is named for a unique geologic formation where the river vanishes underground near the mouth of the canyon and reappears farther down.

A devilishly named gorge that was a sign of salvation for many pioneers.

A popular rock that acted as a waymarker for American pioneers.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

This Wyoming town is fascinated by a particular mythical creature.

A scenic natural bridge with a creek running underneath.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.