The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

A subterranean haunt where wine and homemade biscottis are always on the menu.

Erosion and time have created a naturally-formed water park.

Giant granite rocks standing end-to-end like a train of circus elephants.

The world's largest squirrel statue clutches a pecan bigger than your head.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

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

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.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

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

A giant donut stands as a popular symbol of Los Angeles iconography.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

This private residence was the template for one of the most beloved television homes of all time.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This grand mansion has starred in everything from Bones to Buffy.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A hand-built folk art installation covered with messages of God's love.