Fast route: 4 kilometers (47 minutes)
Happy route: 4.5 kilometers (55 minutes)
Why this’ll make you happy: The happy path takes you from the city’s Humboldt University, where you can browse in one of the country’s largest college libraries. The short route plows along the traffic-filled Karl-Liebknecht-Strasse and Karl-Marx-Allee, while the happy route takes you through a beautiful tree-lined plaza by St. Mary’s, one of the oldest churches in Berlin, and through Alexanderplatz, Berlin’s iconic commercial city center. You’ll end up at the community center and arts space called Alte Feuerwache (the Old Firehouse).