Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

One of the largest, oldest, darkest, quietest motel rooms in the world.

The Magical World of George Phar Legler.

This historic national park is covered in the stunning ruins of red rock pueblos.

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

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

A stealthy Apache hideaway that became the haunting site of a mass grave.

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

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.

A reproduction of earth's many biomes.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A natural gas leak provides a flickering flame beneath a waterfall.

Vibrant street art created with mixed media.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The odd cement nubs littering this Spanish square are actually the entrances to a series of buried silos.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

This ancient amphitheater was restored in the early 1990s.