We had heard from many friends rave reviews for Berlin, so we decided to spend Easter there. The result has vindicated us.
The old city (the former East Berlin) is wonderful, both in terms of building's architecture, and natural beauty, with it's two rivers and canals running through it. The museums are amazing - especially the Pergamon Museum, which is one of the best in the world in my opinion.
The former West Berlin is a modern city without any particular attractions except the parks - the Tiergarden and Charlottenburgh, also the homonymous palace. Do not miss the Kaiser Wilhelm Gedachtniskirche.
Although most modern hotels are located in former West Berlin, around the Potsdamer platz and Kurfursttendamm, the commercial center of former West Berlin, prefer a hotel close to Unter den Linden, to be located near the main attractions.
I also suggest a day trip to Potsdam, a beautiful small town 40 minutes away by train. You can walk through the amazing gardens of the palace, although the palace itself is in bad situation.
From cultural point of view, the city has several Jazz club, but we could not find anything that we liked - perhaps because of the Easter period. We attended a concert in the oranzeri Charlottenburgh, which indented to resemble Bach's time (dresses, lights etc), but the result was poor. On the other hand the Easter concert at the Berliner Dom was remarkable, since the building is beautiful and appropriate for classical music performances.
On Berlin's negative side's I can only mention the behavior of the employees - waiters, museum and transport staff etc, who are arrogant and rude in many cases.
If you find yourself in Berlin do not forget to visit also Gendarmmenmarkt, a magnificent square with the Konzerthaus and two symmetrically placed beautiful temples at both ends of the square, with very nice bars and restaurants around, the area Hackesche Hofe, where you can walk in the shadow of beautiful buildings, the square Bebelplatz, surrounded by magnificent historic buildings and museums, the medieval area Nikolaiviertel for a ride and lunch at the quaint restaurants and of course the Brandenburger Tor and the Reichstag, which requires an application a few days ago via internet, so you can get inside. Finally a walk in the Tiergarden's Neuer See for a cold beer in Beergarden is a necessary component of your trip.