Yesteryday Knoxville Girl posted a picture of their Sunsphere. I thought it looks a little like the Reunion tower in Dallas. Here is a picture of Reunion tower I got last week on our road trip. Here is a link to Knoxvilles Sunsphere.
Reunion tower is 560 ft tall and has a restaurant and observation deck. I havent been up there, but its on my "to-do" list.