This place is like being in the Canary Islands, where my hometown is. The wonderful botanical garden has around 22.000 different plant species. I can find here all the tropical species from the island where i grew up: birds of Paradise, palms or dragon trees.
The central ‘Mitte’ area of Berlin is packed tight with galleries and museums, which means you can cram a lot into a short amount of time, if that’s what you want.
The best of the lot is the Me Collectors Room, which shows off large chunks of the Thomas Olbricht collection alongside other contemporary private artworks. The permanent ‘Wunderkammer’ display offers over 200 pieces from the Renaissance and the Baroque periods, with a solid focus on the strange and macabre. There’s even a Mark Ryden original that fits in nicely.
It's a small bookshop to be stuck forever. Here you can find the most beautiful collection of art/photography/architecture/fashion/food books and magazines, not to count it's just a walk distance to diverse galleries around the neighborhood.
There's nothing more revigorating during the dark winter days than spending a couple of hours in a sauna. Germans have mastered the art of sauna and you can find amazing pieces of architecture in the public swimming pools (Stadtbad). I find Stadtbad Neukölln very peculiar in its neoclassic architecture and it's definitely a wallet-friendly option to enjoy some sauna time there. Be prepared to be naked in front of man and woman!