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

The bones of an old zoo crumbling in the shadow of a new one.

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

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

Strange physical sensations and optical contradictions keep visitors coming back for more.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A lavender labyrinth so large it’s visible on Google Earth.

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

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

Astounding collection of coin-operated games and automata.

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

This freshwater spring fills with 10,000 gallons of water per minute.

This sprawling bookstore spans four floors and has more than a million books in stock.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

Abandoned concert venue legendary for its rock counterculture.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.