During Basler Herbstmesse
For two other photos from the same tower see my blog
Schleuse beim Kraftwerk Birsfelden, im Hintergrund das Basler Münster
The picture is mirrored.
View from Wasserturm Allschwil.
If you're ever in Basel, don't miss using the ferries - they contribute a lot to the city's charm.
Picture taken from Vogel Gryff.
Thank you (answer is 47.49283, 7.68951)