Kurfurstendamm is Berlin's 5th Avenue.
High style shopping, 5 star hotels, Fancy restaurants, wide sidewalks and lots of trees for shade on sunny days. At the east end is the Kaiser William Memorial Church and the Europa Center with the site of the Christmas Day Massacre between them. The Kaiser William Memorial Church is left as it was just after WWII. The Europa Center is a mall with lots of stores and a water clock worth seeing.
The Story of Berlin is a museum with an entrance inside a mall. There you can learn 800 years of Berlin's history in a 2 hour tour. The tour includes a bunker which was an actual Atomic Bomb Shelter.
Check for open times, English speaking tours, and availability.