author of image and license:  4028mdk09 / CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0)

I did some resize/crop etc.

original location: https://commons.wikimedia.org/wiki/File:T%C3%9CV_S%C3%BCd_Hei%C3%9Fluftballon_D-OTUE_2011.JPG