The famous-person small museum: Käthe Kollwitz Museum Berlin, currently at Schloss Charlottenburg, Spandauer Damm 10, 14059 Berlin.
The first museum dedicated to the German expressionist sculptor and printmaker Käthe Kollwitz (1867-1945) — her drawings, etchings, sculptures of mothers and grieving figures (themes drawn from losing her son in WWI and her grandson in WWII). Small, contained, deeply moving.
Note: the museum is set to relocate; check the official site before visiting.
The 2024-2026 must-see: Humboldt Forum at Schloßplatz, 10178 Berlin in Mitte — the reconstructed Berlin Palace housing the city's non-European ethnological collections, opened in stages between 2021 and 2023 and now fully operational.
Free admission to the building itself; ticketed for the museum exhibitions. The roof terrace gives one of central Berlin's best skyline views, looking down Unter den Linden to the Brandenburg Gate.
Also: the new Museum of the 20th Century at the Kulturforum (designed by Herzog & de Meuron) is under construction with a planned opening in 2027.
1-3 day itinerary: Day 1 — Cold War history (Brandenburg Gate, Reichstag dome — book ahead free, Memorial to the Murdered Jews of Europe, East Side Gallery), evening in Mitte.
Day 2 — Museum Island morning (Pergamon, Neues Museum with the Nefertiti bust, Humboldt Forum), Hackescher Markt and Scheunenviertel afternoon, dinner at Schwarzwaldstuben.
Day 3 — Kreuzberg morning (Jüdisches Museum by Daniel Libeskind, Mustafa's Kebap lunch, Turkish Market on Maybachufer if Tuesday/Friday), Tempelhofer Feld afternoon (former airport now public park), late night at Berghain or SchwuZ depending on energy.