The lost ruins of the forgotten ferry lie hidden beneath the silt.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

The first permanent memorial to a unique secret weapon of World War II.

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

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

The eroded core of an ancient volcano is now accessible by a short hike.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

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

Limestone caves with spectacular showcase chambers.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A reproduction of earth's many biomes.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This rural museum is home to more than 50 local desert reptiles and the world's largest snake bite kit collection.

High in the Sacramento Mountains, a facility dedicated to studying the sun.

This sundial indicates the time based on where you stand within it.

A vibrant colony of rescued wolves and other canids.

These strange carved boulders in a forested canyon resemble tiny stone villages.

This remote camping site offers incredible stargazing opportunities.

The state bird of New Mexico, constructed entirely out of garbage.

Deadly airliner crash preserved for those willing to climb and pay respects.

The shattered remnants of a meteor that struck Santa Fe more than a billion years ago.