2903 South Martin Street as Brimborn Steel Works
The ambulance drives past the building as Heather transforms her parents inside.
“Chapter Four: The Sauna Test” Filming Locations
The kids join together to investigate Billy, the mall team gets a new recruit to investigate some ventilation shafts, and the mayor comes under suspicion.
Stranger Things episode “Chapter Four: The Sauna Test” was filmed in Atlanta, Lithonia, & Stone Mountain in the United States of America.
Gwinnett Place Mall as Starcourt Mall
Dustin stakes out the heavily guarded entrance and Robin comes up with an alternative way past security.
Source: Stranger Things — Wikia
6980 Main Street as The Hawkins Post
Tom Holloway yells at Nancy and Jonathan for their investigation and fires them both.
2530 Piney Wood Lane as Wheeler House
Max and Eleven ride to meet the boys after they call the Code Red.
Source: Stranger Things — Wikia
East Point City Hall as Hawkins Town Hall
Hopper and Joyce head to confront the mayor about the man on the motorcycle and Hopper ends up kidnapping him.
South Bend Pool as Hawkins Community Pool
Eleven, Max, Mike, Lucas, and Will watch Billy and come up with a plan to reveal his true nature.
Source: IMDb
5505 Bahia Mar Circle as Kline's Mansion
Hopper and Joyce force Mayor Kline to hand them the property records from his safe.
Source: Kelly
Emory University Hospital Smyrna (Emory University) as Hawkins Memorial Hospital
Nancy drives to the hospital where Mrs. Driscoll is being held and pretends to be her relative to get into her room.