The plants form a living library and laboratory for researchers and students at Michigan State University.

The park is home to the United States's only still-operating Dutch windmill.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

A spiritual vortex among the red rocks in Sedona.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Half of a waterfall goes into the river while the other half seems to disappear.

A spooky defunct railroad tunnel now part of a sprawling trail.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

The watery grave of an impractical idea.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

When ecosystems collide in the arid Southwest.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.