A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This empty Detroit high school was too expensive to maintain or destroy.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Though its branches are painted bright colors by generations of locals, the tree is said to be a haunted portal to hell.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Largest magic museum in the United States with more than half a million pieces of memorabilia.

A Beaux-Arts triumph set to become Ford's innovation campus

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

An acoustic anomaly with a mysterious cause.

This restaurant proudly displays bread signed by the 39th president.

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.

This unique collection collects pieces of art etched into thin pieces of stone.

The city is full of whimsical portals to another world.

The world's only known button museum.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.