The third film in the Divergent series has just hit theaters. Allegiant Part 1, like Insurgent, was filmed largely in Atlanta, Georgia. Atlanta is one of the fastest-growing bases for filming in the world. In addition to monetary incentives offered by the state of Georgia, the city of Atlanta provides a beautiful conglomeration of urban and natural landscapes ideal for a vast array of location needs.
One location utilized in Allegiant is the Georgia Archives Building. Built in 1965, this massive block of marble was considered the apex of innovation in archival facilities.
After discovering the building was sinking, the state moved the archives to a newly constructed facility in the metro area. Now the "white ice cube" is used as a location to make movies. CGI put this building in San Francisco for the headquarters of Pym Technologies in Ant-Man.
In Allegiant, this location is recognizable by it's unique doors, which are comprised of small, metal, circular shapes that contrast nicely with the boxy stone of the rest of the building.
Another building in Atlanta utilized in the past for filming is the High Museum of Art. The interior of the High was used to film parts of the 1986 film, Manhunter, about Hannibal Lecter. It is a beautiful building, inside and out, fit to house internationally renowned art.
It is the exterior that is used in Allegiant, though. The sharp angles of ramps and stairs opposing the curving shapes of the main structure are recognizable from scenes in the film.
I have not been able to verify a third location used in Allegiant: Bellwood Quarry. However, when I visited the quarry last summer with a team from Atlanta Watershed (the quarry is not open to the public), I was sworn to secrecy about what movie-related stuff I saw on the site at that time. I knew Captain America: Civil War was filming in town, and I assumed the tank-like vehicle I spotted near the quarry was associated with that.
The vehicle I saw, though, was very similar to the ones used by Dauntless in Allegiant. Additionally, the terrain just outside the walls in the film looked incredibly familiar.
Bellwood Quarry was used in several episodes of the first season of The Walking Dead, and in a scene from The Hunger Games: Mockingjay Part 1. It is a gorgeous location, but is slated to be tapped into the Chattahoochee River to form a reservoir from which I will someday get my drinking water.