"The Reptile Man's" very own roadside zoo features an albino alligator.

This dilapidated ship carcass covered in trees is a striking sight.

Mysterious ancient petroglyphs carved on a glacial boulder at the tip of Bainbridge Island.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

A Wild West jailhouse that slid down the mountainside.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Ancient pueblos built into the base of a natural canyon wall.

Limestone caves with spectacular showcase chambers.

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

America's only nuclear missile silo open to the public.

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

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A reproduction of earth's many biomes.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.