Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The Hudson River School comes alive at this palatial estate.

Eight whimsical acres of metal art.

Three acres of mythology-inspired sculptures are visible from the highway.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

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

World's largest Christmas store.

The only surviving prototype for Buckminster Fuller's house of the future.

Astounding collection of coin-operated games and automata.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Detroit’s downtown castle is one of the oldest structures in the city.

Dilapidated Mayan-themed ballroom was one of Detroit's most popular venues through the 40s.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.