This metro entrance leads to the entrance of the Berliner Unterwelten tour. Very informative and interesting tour, highly recommended.
It was a refreshing meal and a very pleasant surprise to have found this restaurant. We read good reviews on tripadvsior but wasn’t really expecting it to be so busy. The dining area was fully booked but the server had kindly arranged a dining table for us to use before their other customers arrived at the reserved time. We then moved over to the bar to have our dessert and coffee.