Before diving into the list of things to do, make sure to get yourself a bike to see the city, as it's the cheapest and oftentimes the fastest means of transportation. Nextbike and "Call a bike" bikes are my favorite ones. Register yourself through these apps in no time and start exploring the city!

Museums

• Check out the Museum island!
• DDR museum
• Stasi museum

Viewpoints

• Fernsehturm (TV tower) = 22.5 euros
• Berliner Dom (cathedral) = 9 euros
• Panoramapunkt = 7.5 euros. Make sure to also check out Potsdamer Platz.
• Siegessäule (victory column) = 3.5 euros to the top
• The rooftop of the Park-Inn hotel = 3 euros, I've been told

Fun activities

• Tropical Island
• Canoeing
• Illuseum Berlin (museum of illusion): very fun, lasts an hour, 12 euros

Must-see

• Brandenburger Tor (Brandenburg gate)
• Reichstag = book at least a month in advance, and get a free guided tour! One of my favorite activities in Berlin.
• Wander in Tiergarten
• Unter den Linden
• Memorial to the Murdered Jews of Europe
• East Side gallery and Oberbaumbrücke
• Checkpoint Charlie
• Tempelhofer Feld
• Gendarmenmarkt

Restaurants

• YAFO
• Umami (in Prenzlauer Berg)
• Cafe Anna Blume = go there for a nice brunch
• Hofbräu Wirtshaus Berlin = AMAZING atmosphere, expect some singing and jumping on the benches! And loads of beer!

Bonus

• Mauerpark and its Sunday flea market. Next to it is the Berlin Wall Memorial.
• Berlin Unterwelten: nice tours in the underground Berlin, available in multiple languages, not just English or German
• Teufelsberg: the ticket costs 8 euros. On Saturdays at 2pm it even gets you an hour long guided tour.
• Nikolaiviertel
• Soviet War Memorial in Tiergarten
• Go to one of the numerous flea markets that take place on the weekends
• Mall of Berlin = there is a slide inside!
• In Potsdam (outside Berlin): the Sanssouci Palace and the Neues Palais. Get a Sanssouci+ Ticket for 22 euros and visit them both but also the windmill, the picture gallery, and more, on the same day!
• Klunkerkranich
• Berlin Story bunker
• Go watch a show at Friedrichstadt-Palast or at Wintergarten
• Eat at Markthalle Neun
• Visit the root terrace of the Humboldt Forum