The Newseum, a museum in Washington DC devoted to the first amendment and freedom of the press, has the largest collection of Berlin Wall pieces outside of Germany. It also has a great exhibit about the Berlin Wall. Here are some photos.
The Berlin Wall section slabs are lined up as they would appear from the West Berlin side.
The West Berlin side of the wall was heavily graffitied.
The exhibit at the Newseum includes one of nearly 300 watchtowers built along the wall. It’s actually a bit shorter here than it originally was. They literally built the Newseum building are pins the exhibit.
The east side of the Berlin Wall is clear of graffiti. It simply wasn’t accessible to people on the east side.