@andrew_chou no idea what kind of places you’re into but here are my favourite ones:
- the Reichstag is fun to visit, cool architecture and amazing view of the city (but reserve a place online a day before)
- the Technikmuseum :) really unique exhibits
- the Botanischer Garten, i absolutely love the greenhouses
- the Zoo (there are pandas :))
- the Museum für Naturkunde (amazing dinosaur exhibits)
- the rooftop of Bikini Berlin is fun to walk around