Just outside Atlanta.
For certain values of "just outside." Kennesaw is "just outside" Atlanta like Newark is "just outside" Manhattan.
When I was a kid, Kennesaw was a day trip. We'd pack a picnic basket with some cold fried chicken and potato salad, and hike to the top of the mountain.
Kennesaw Mountain is a big Appalachian foothill, and was a key hold point in the Atlanta campaign during the War of Northern Aggression. It, and the surrounding territory, are a national battlefield park. It's a nice day hike, enough to get your blood going, have a picnic up top, and then walk back down. Stop by the plaques and historical displays on the way.
Back to the point, Kennesaw was an excursion when I was a kid. Now it's a commute. That's sprawl in a nutshell.