Even on a tight schedule, Memorial to the Murdered Jews of Europe (Holocaust Memorial) earns the hours.
Allow 45 min–1.5 hr.
Walking into the dipping, disorienting grid of slabs is a powerful bodily experience, and the free Ort der Information below is among the most affecting museums anywhere. The catch: it's an open plaza, so you'll see tourists clambering and posing on the stelae, which can puncture the gravity.