Personally, I love museums and visit them whenever and wherever I travel. Berlin is no exception. Museum Island is a must! I sadly only had time for the Pergamon museum. Having visited Pergamon, I was really excited to see the exhibits. Sadly, the altar from Pergamon is under renovation so I will have to make another trip. Favorite part was the original walls of Babylon dating from biblical times. I've learned about this in my ancient near eastern studies and was blown away with the grandeur. Highly recommend especially if there's poor weather!