The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

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

This church on a Tohono O'Odham reservation has stood since 1797.

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

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

This collection of neon icons is preserving Arizona's history, one sign at a time.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

A natural history wunderkammer in the middle of the desert.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

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

An urban laboratory.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Legend says train robbers stashed their gold within the depths of this unusual cave.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

This woodland architectural installation acts as a camera obscura for the heavens.

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

Miraculous tree that seems to sprout out of solid rock.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

The only free-standing, vertical sundial in the US was keeping standard time before it was even invented.

This natural spring not only claims to heal the wounded but it has also been willed to God.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A nude beach alongside a washed-out road.