Building A (Emory University) as Hawkins National Laboratory
A swarm of demodogs climb out of the pit and swarm throughout the facility.
Source: IMDb
“Chapter Eight: The Mind Flayer” Filming Locations
After the demogorgons attack the lab, those trapped inside must find a way to escape the lockdown alive.
Stranger Things episode “Chapter Eight: The Mind Flayer” was filmed in Stone Mountain, Atlanta, & Conyers in the United States of America.
5280 Moore Street as Hargrove House
Max's parents return home to find their daughter missing.
Source: Stranger Things — Wikia
Stone Mountain Park as Hawkins Woods
Dustin & Lucas get into a fight while walking down the tracks with Steve & Max.
Source: Stranger Things — Wikia
Rockdale County Water Treatment as Hawkins National Laboratory (gate)
Nancy and Jonathan arrive at the front gate only to find it deserted with the power out.
Source: Filming Locations Map