Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

Along a California highway is a kind of Jurassic Park made of metal.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

Scattered around Atlanta are little doors with big charm.

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

Astounding collection of coin-operated games and automata.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Five acres of divinely inspired folk art.

A lavender labyrinth so large it’s visible on Google Earth.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A circus of light and sound forms a sensory ode to an iconic train that will never pass through town again.

A unique botanical garden housed in three giant geodesic domes.

A theme park attraction designed to turn your children into LARPers.

A bizarre house filled with an astounding array of collections.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.

The park that the Chicago Stockyards built.

The house is an iconic pilgrimage site for fans of the Illinois-based emo band.