There are 180 museums in Berlin, top ones are located on the Museum Island (Museum Insel). The Pergamon Museum is the most visited in Berlin. And there are tons of things to see - from ancient greeks, egyptian art, babylonian art and many other things - to mention the highlights - Pergamon Altar of Zeus, Roman market gate of Milet and Ishtar Gate with the Processional Way of Babylon. Ishtar Gate is my favourite - blue coloured tiles with huge animals - lions, mainly. Check for yourself!