It's my own desing, tried to give it somewhat older feeling. Took really a lot of time to draw, probably more than any other single pic I've done for civ. Definitely a happy face type of deal!
If you want to use it as a wonder I enclosed a crappy splash. Wouldn't mind if Rufus T. Firefly would to new splashes to every building I've done.
Amusement Park 2016-10-05