Pit Mine off Desert Mound Road as Pool
Katniss sings The Hanging Tree for her camera crew in the ruins of District 12.
Source: IMDb
The Hunger Games: Mockingjay - Part 1 Filming Locations
See also: The Hunger Games, Catching Fire, & Mockingjay - Part 2.
The Hunger Games: Mockingjay - Part 1 was filmed in Atlanta in the United States of America.