On the way back to gatlinburg from clingmans dome (which the dome is on the north carolina side) I had to take that picture that so many millions before me have taken, haw haw.
From the road below, heading up to the parking lot of the trailhead to clingmans dome, you can see the top of the observation tower. to the right of center.
Glingmans dome, there is a spiral ramp going up to this observation tower, with a full 360 degree view and this is the highest point in the smoky mountains national park!