This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Race through the maze, get your name on the sign.

This print shop boasts one of the largest pinball arcades in San Francisco.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Mine your own precious stones.

A Circus legend leaves an unexpected endowment.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

An ever-growing collection of rare and strange objects owned by local Arkansas illusionist Maxwell Blade.

It's not a typo, now say it five times fast!

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

A natural history wunderkammer in the middle of the desert.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

Five acres of divinely inspired folk art.

This offbeat trailer park is home to vintage peddlers, local artists, indie makers, and more.

Check out the underground party scene at the "Burning Man of Brooklyn."

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

A deserted hodgepodge of experimental structures designed by nearby university students.

A Tucson museum and performance space full of found-object movable sculptures.