This small interfaith chapel lies not far from the rim of the Grand Canyon.

The remnants of a creative early method of wildfire prevention.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

This Native American settlement dates back to the Pueblo II period.

More than a century old, this trading post resides in the Navajo Nation.

The location where the iconic movie character declared it was time to go home.

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

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Many believe these images represent interstellar lifeforms.

One of the few remaining indigenous petroglyph sites in Nevada.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

The self-proclaimed gateway to the Extraterrestrial Highway.

This sign designates the road that leads to the infamous Area 51.

The farthest you can be in the contiguous U.S. from a McDonald's location.

An eatery for UFO seekers on the Extraterrestrial Highway.

Mysterious meeting place for UFO hunters near Area 51.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

A beautiful maze marks where three countries meet.

The tallest mountain in mainland Netherlands isn't actually very tall.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.