My sixty-year-old father will still, upon being asked if he is a Turtle, respond "you bet your sweet ass I am." Great fun when I was younger, and still a good thing to pull out at times like midnight Mass and funerals.

The recommendation to go to the Jewish Museum is spot-on; it's the most impressive building I've ever been in. Liebskind's design was effective enough that the museum was open for a while without any exhibits except the building itself.

It's also worth checking out the (relatively) new Memorial to the Murdered Jews of Europe, which you'll probably find anyway. Unless you're planning a trip to Montgomery, Alabama, sometime soon, it's your best chance to see how former perpetrators memorialize their victims.

Touristy, yes, but the Reichstag dome is pretty cool. See if you can find the graffiti left by Red Army troops.

I haven't been to any of the "blind" restaurants, but some friends of mine ate at Nocti Vagus a few years ago and enjoyed the experience. http://noctivagus.com/english1.htm

And try a colaweiss--cola and beer. Better than it sounds. Much better. There's a restaurant in the Sony Europe complex that serves them; I'm sure they're the Applebee's of Berlin, but I didn't know any better.