This abandoned prison castle has become an imposing gallery of graffiti art.

An abandoned concrete jungle surrounded by a lush park.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

Volunteer-run library dedicated to exploring five decades of activism history.

This resort community was known as the "Black Eden of Michigan."

These sprawling mines once served as a source of plaster and today serve as a storage facility.

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

A crumbling mountain resort that looks like it was abandoned in an instant.

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

Large one-man sculpture park in Michigan.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

When waves crash onto this section of beach, the rocks sing a song.

A spooky defunct railroad tunnel now part of a sprawling trail.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

An unusual assortment of art, furniture, and other curiosities.

This old residential building was once the largest flour mill in the world.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.

Funhouse of found art and participatory sculpture.

When flour explodes, it's not a pretty sight.

The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

Secret hideaway for an alternative beach experience.