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

Chicago’s incendiary role in the labor movement.

The home of 1.5 million wood letters for printing is still a functioning workshop.

An oddly poignant roadside attraction celebrating American folklore.

Minimalist modern art on a repurposed military base in rural Texas.

This abandoned 19th century orphanage started as a boarding school for children of Civil War veterans.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

This overgrown Illinois water park offers a whole new type of adventure.

Former meatpacking facility turned vertical farm and sustainable business complex.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The subtle science of a master molecular gastronomist.

Homemade outdoor church and sculpture garden decorated with glass shards.

This 16th-century monastery has been turned into a surrealist architecture compound.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

The arboretum whose marshy soil sucked up the dreams of housing developers.

A theme park attraction designed to turn your children into LARPers.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

The first declared National Monument in the United States.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.