The Berliner Dom or the Berlin Cathedral
The Brandenburg Gate was a must see. I have to admit that I thought it would be grander. It's smaller than what I imagined.
This is the view from Puro Skylounge in Berlin. We spent 2 rocking evenings (or mornings) at Puro. I was disappointed by their (none) choice of drinks but the music was good. 
http://www.puroberlin.de/
