Mauerpark is a park in the heart of Prenzlauer Berg. It's best known for its Sunday flea market, vibrant atmosphere, karaoke, and local artists. It's also a great place for walks or sporting activities on other days of the week.
Social dance clubs or open-air venues (salsa, bachata, kizomba, swing, zouk, etc.)
You can easily get around in Berlin using a bike. It's much easier than using car or public transport.
Gifts, accessories, decor items, t-shirts, tote bags, wall art, postcards, souvenirs and more from Berlin City Germany
Some of the thousand restaurants and food places in Berlin
Best beach bars in the summer
If you're looking for the easiest and cheapest way to see the city, I'd suggest buying a day pass for the public buses. Take the 100 or 200 bus lines and hop on and off at the most important historical sites in Berlin.
There are a lot of hotels and apartments. Here are just a few recs.