If you like plants, nature and a pleasant walk in a pretty setting Berlin’s Botanical Garden and Botanical Museum is worth a visit.
In the four hours we were there we only managed to see the greenhouses (which are amazing!) and the museum but I would like to go again and explore the park outside.
It costs €6 to get in but you have access to the whole garden, greenhouses, and museum. The museum is very interesting despite the entrance’s 70s vibe, with the golden aluminium door and window frames. I loved it and we didn’t even manage to see it all. (If I was a kid I would have gone nuts.) They have exhibitions about where different fibers, grains, and fruit came from, very cool dioramas about cotton fields, prehistorical plants and animals, and many, many more.
If you are in Berlin, with or without kids, you should give a go!

Here are some photos taken inside the greenhouses.