This was taken just a few minutes before the “Rhine In Flames” firework started last year in the city of Koblenz, Germany.
The area where the people are standing is called the 'german corner" where the Mosel river flows into the Rhine.
Behind on top of the hill is the ‘Ehrenbreitstein fortress’, where the fireworks took place.
RAW-file (CC BY-NC 4.0):
20180811_Koblenz_758_Rhein_in_Flammen.DNG (11.0 MB)