I am hoping to have a few days in Berlin - probably in September. Would appreciate any advice on the best areas to stay, and any advice on the best transport from airport to city centre.
Is Berlin walkable? Or will we need to use bus / train etc?
Is there any 'must-sees' or, equally, 'don't bother withs'
DS is coeliac and I'm not sure how easy that will be to navigate.
Any advice on Berlin from people who know the city would be really welcome!