When you have to pay extra then I usually do and share the photos for others to see :D I don't understand why you have to pay to take photos. They should increase the entrance fee and let people do free marketing for them :) It looks like some places still don't understand the power of social media sites :) I'll be happy to go there and take some photos :)
Oh, Danube is so dirty! But I saw it in Germany (when it's still a small river) and it's so nice and clean. Then I saw it in Bratislava and I swore I would never put a finger into it. I'm not even saying how it looked in Belgrade.. and people were still swimming there..
I'm looking forward to seeing that photo with your tent :)
I hope to go to Berlin this year again!
Have a lovely weekend, Dan!