The East Side Gallery, not to be confused with the Far Side Gallery :), is a 1.3km long section of the Berlin Wall that was left intact as an international memorial for freedom.
105 paintings by artists from all over the world were painted in 1990, shortly after the unification. Documenting a time of change and hope for a brighter future, it is possibly the largest and longest-lasting open air gallery in the world.
Naturally the Wall has never been linked to anything positive, except for the day it was torn down, and it felt pretty good to walk along it and decode the message of freedom and hope as shown through the murals. There are a few famous ones that you can see on shirts and posters long before ever getting to the East Side Gallery, the above Trabi painting is one of them, and the Fraternal Kiss between Brezhnev and Honecker is another. I’m pretty certain our kiss is not politically correct, but it was still a much smaller smooch than the one painted behind us.
The East Side Gallery is easily accessible from both ends by metro and I highly recommend seeing it, though almost all of the murals have been restored and some have been updated quite a bit since 1990.