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

A classic roadside attraction on Vermont's historic Route 5.

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

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

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

A Saint Nicholas-themed ghost town in the Mojave desert.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Don't blink or you'll miss it.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

A former utopian healing center created by a huckster and built by derelicts.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

Like Stonehenge, but with boats and oodles more charm.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

The site of the first "historically true" UFO encounter in the U.S.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Three acres of mythology-inspired sculptures are visible from the highway.

An artist sees trees as a medium for sculpture.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

Eight whimsical acres of metal art.

A lonely house representing railroad history tells the stories of those who rode the rails.

The U.S.' first commercial park dedicated entirely to flying drones.

A true roadside icon standing on the same plains that the herds once roamed.