Found this one interesting https://www.eslwriting.org/esl-writing-fall-2018-y1-week-13/
So I tried to describe the picture.
My writing is below:
There are many people in this room. People are holding camera or smartphone, nearly all of them are faceing toward one direction. Adult, kid, older, everyone is trying to record or take picture. At the background there is a wall with lots of paints on it. Maybe this place is not a room but a hall of art museum. There are belt barriers prevent people from something they want to get as close as possible.