Here's a rundown of Atlanta after the 1996 Summer Olympics:
Olympic Stadium was converted into Turner Field (The stadium was designed with the post Olympic conversion in mind. Many of the sections removed found new homes in the Atlanta area as the seating sections at a number of high school stadiums.)
The Olympic Village is now dorms for Georgia Tech and Georgia State University.
Fulton County Stadium (baseball venue) was torn down to become a parking lot for Turner Field.
The Omni was torn down and replaced with Philips Arena
Of the Olympic venues @ Stone Mountain Park, the Tennis Center is the only venue still there, as the other venues were designed to be temporary setups.
The Aquatics Center @ Georgia Tech has been remodeled, with the entire building enclosed, and some additional facilities integrated into the building.
The canoeing and rowing venue @ Lake Lanier is in use after being shuttered for a few years after the games.
The Olympic shooting venue @ Wolf Creek is in limbo, as Fulton County had shuttered the facility due to budget cuts, but there are plans to turn it into a law enforcement training facility.
The beach volleyball venue @ Clayton County International Park is still there, but hasn't been used. Some taxpayers here in Clayton County are still critical of the county's decision to buy the park prior to the Games, as the facility has not made enough money to justify the purchase.
Many of the venues that were existing prior to the Olympics (Georgia Dome, Alexander Memorial Colosseum, GA
World Congress Center, Sanford Stadium, Herndon Stadium) are still around, some have had some modifications and additions, but are still in use.