This charmingly homemade amusement park has been growing for 40 years.

The Wonder Road aka Doobie Lane, a mile-long strip of dirt road filled with folk art.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

See six states, pickled freaks, rocks, and antiques.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

A Beaux-Arts triumph set to become Ford's innovation campus

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Take a drunken tour inside the world's largest known geode.

Moving, mind-blowing metal sculpture work of an outsider artist.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

This striking art museum holds an amazing series of curiosity cabinets.

House built with over 60,000 glass bottles.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

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

Amateur taxidermy museum known for its large collection of white squirrels.

Homemade outdoor church and sculpture garden decorated with glass shards.

A bizarre house filled with an astounding array of collections.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

A curious sculpture garden and museum in Cochrane, Wisconsin.

A museum celebrating the Victorian obsession with hair art.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.