Home to a forest of whimsical pygmy Coast live oak.

The only pachinko parlor in the United States.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

As fallout from an irrigation project, a formerly cottonwood-lined stream is now a sandy, desolate, post-apocalyptic channel lined with weathered stumps and tumbleweeds.

This downtown Dallas art installation is always on the lookout.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A sculpture of a salmon swimming through a brick building.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A little-known memorial to servicemen and nurses killed in the line of duty during the First World War.

One of two giant blue cockerel statues erected with an intentional double meaning.

A Foundry on a Sleepy Street.

More gold than anywhere else, ever.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

When this test site was abandoned, they didn't even bother to take the rocket with them.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

An aluminum skeleton brings Chinese mythology to the French shore.