GRANTVILLE, Ga. - When the cotton mill closed, the rural Georgia town of Grantville began a slow transformation into a ghost town.
Residents fled. Storefronts faded. Buildings decayed.
Over the decades, time turned the remains of the town into something almost post-apocalyptic, the perfect modern-day set for humans and "walkers" to attack one another. That's how the hugely popular TV show "The Walking Dead" ended up coming to town and bringing new life to Grantville.
Several key scenes in one episode from the AMC series were filmed on and near a one-block stretch of antique buildings on Grantville's Main Street.
The series' fourth season premieres Sunday. Crews have been filming the new episodes in Georgia, but they keep locations of future episodes closely guarded secrets until the shows air.
In Grantville, the town's ruins were featured prominently last season. Bodies of walkers slain on the show were buried in a vacant lot beneath the brick archway remaining from a cotton mill building. Gunshots were fired from a nearby rooftop.
And actor Chandler Riggs, who plays a boy on the show, entertained himself between scenes by placing pennies on the railroad tracks, the coins soon smashed into souvenirs by passing freight trains.
Now every Saturday, visitors from around the country and the world turn off Interstate 85 and onto a two-lane highway that leads to the tiny town 49 miles southwest of Atlanta.
Since last summer, more than 3,600 visitors have taken a free tour led by Grantville Mayor Jim Sells, who explains where each scene from the "Clear" episode - during which the character Morgan makes it his mission to "clear" walkers by killing them - was filmed.
Visitors have come from as far as Australia, Singapore and Brazil, giving new life to the town through tourism, Sells said. He calls it phenomenal, but adds: "We don't understand it."
"Nobody came after they filmed 'Lawless' and 'Broken Bridges' here," he said, referring to movies shot in the town.
"But once this episode aired from 'The Walking Dead,' people started showing up from all over."
The cotton textile industry once fueled the economy of Grantville and the other towns in Coweta County, where a stretch of Interstate 85 is named the Alan Jackson Highway, for the country singer who grew up in nearby Newnan and wrote the 1993 hit song about the Chattahoochee River.
Grantville eventually became known by residents in the area as "the liquor exit" - it's the only place in Coweta County to buy bottled liquor. But Sells said that "when textiles left, this town died."