Berlin TV Tower (Fernsehturm) is a real time commitment — fit it in only if it's a priority.
Allow 45 min–1.5 hr.
On a clear day the panorama is unbeatable — you orient the whole flat city at a glance, and the revolving restaurant is a kitschy retro thrill. The catch: tickets are pricey, queues are long without a timed slot, and on a grey day it's a dear ride up to murk.