Illegal drag racing two stories beneath Chicago’s streets.

A huge musical instrument played by the ocean.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

This former industrial site has transformed into a community sculpture garden that hosts monthly Full Moon parties.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

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

Standing guard on top of an old, vacant ice cream shop.

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

Concrete igloos standing across from what remains of the Michigan Central train depot.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

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

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

A physical reminder of Earth's ancient past, this rock results from the photosynthetic processes of some of the oldest forms of life.

This museum explores the history and development of dentistry and dental technology in Michigan.

A museum dedicated to the dead and the tools used to usher them into the afterlife.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

The 10-foot-tall vegetables belong to Michigan’s first food rescue program.

This 19th-century former train station’s unusual roof shape earned it a rather witchy name.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

Little did a museum know, they possessed the last-known lunch wagon in existence.

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