Maybe a fixed advertising Balloon?
( ...near Meigs airfield?)
There is one at Los Angeles, near KLAX airfield. The "Goodyear" balloon!
Paul....Full of hot air....
P.S...love the 2D panel!...
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.