That halo is no result of sharpening but of your attempts to tonemap this photo by selectively lighting up the temple and temple grounds and by either leaving the sky untouched or giving the sky its extra treatment. You pulled the highlights of the ground too high and since you feathered your line well to have smooth transitions, those highlights also lit up that tiny part of the sky around the temple.
Happens to me so often when I try to tonemap LR pics, and often the subsequent use of the burn tool looks bad ... to the consequence that you can only push your tonemapping so-and-so far, but no further, if you do NOT want to create any halos.