Germany
Located in a park, this memorial/museum will tell you how the wall went up, the history of how the Easterners were kept in East Berlin, and stories of people who crossed the wall.
Germany
We found this museum fascinating. It covers the stories (and many ways) East Germans crossed the Wall to freedom during the Cold War. The museum itself is somewhat overwhelming with the sheer amount of things, however it's a very interesting look on how people lived and escaped. You'll also learn about how the wall was built. You can visit this museum late (it's open until 10pm).