The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Enormous small-business mecca in the Midwest, serving dozens of artists.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A fitting attraction for the corn capital of the world.

An urban laboratory.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A geological mystery on Camelback Mountain.

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