My grandmother lived in Georgia and she had a peach tree in her backyard. The peaches that it produced were some of the sweetest and most flavorful I have ever had. She used to pick a peach and then slice it up and put a few slices in everyone's tea glass.
The peach sweetened the tea in a natural way and also imparted some of the peach flavor. The taste of the tea was more authentic than any other flavored tea I have ever tried. It makes Snapple peach iced tea taste like diet coke.