Less a museum than a bizarre fantasy world created by artists and engineers.

An urban forest overtakes what was the greatest failure of utopic urban housing.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Home with Gothic windows featured in a famous painting.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

The remains of a bustling turn-of-the-century park built to showcase the wonders of electricity.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

This small, but long-running hobby club has built one of the largest model rail lines in the US.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

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

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

This Old Testament garden features 100 plants from biblical times.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Where beautiful signs live on forever.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.