A century-old network of freight tunnels underneath the city's historic business district.

This art gallery and oddities boutique bewitches visitors with a trove of occult trinkets and eccentric antiques, work by an ever-changing roster of underground artists, and classes in tarot and other mystic arts.

The 606 is a decade in the making.

The beloved home to all publications indie, erotic, and punky.

A Bibliophile's Dream.

Former bath house turns gastropub.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

One of the last functioning antique elevators in Chicago.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The warmest cave in the Ozarks features two seemingly bottomless lakes.

One of the few surviving "Wigwam"-themed motels.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

A Building for Your (Former) Funerary Needs.

A Studio on the Fringes of the Northeast Art District.

A garden full of metal sculptures that celebrate the double bass.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

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

This century-old barn is home to a homey, eclectic film festival.

A futuristic climate change study is nestled deep within this public land.

Grand opera on a miniature scale.

A hidden grotto on the grounds of the Kane County Government Center.

It leads to a former hospital’s old root cellar.

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

This enchanting forest trail leads to ethereal abodes and a giant bird's nest.