When I saw the first photos, I remembered the "lights show" in a park in Malaga (or it was Almeria?), 2-3 years ago... It looked like the whole park was underwater, as you could see shapes of medusae and fish all around the trees... But what you had is much more than that! It's a whole circus in the open air!
Hopefully, there will be something similar in Prague when we come to visit it!
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I’ll check for the events these days :) thanks for curating the post!