I only had two things I wanted to see in Prague, one was the Lennon Wall.
Form Wikipedia: "The Lennon Wall or John Lennon Wall, is a wall in Prague, Czech Republic. Once a normal wall, since the 1980s it has been filled with John Lennon-inspiredgraffiti and pieces of lyrics from Beatles songs.
In 1988, the wall was a source of irritation for the communist regime of Gustáv Husák. Young Czechs would write grievances on the wall and in a report of the time this led to a clash between hundreds of students and security police on the nearby Charles Bridge. The movement these students followed was described ironically as "Lennonism" and Czech authorities described these people variously as alcoholics, mentally deranged, sociopathic, and agents of Westerncapitalism.
The wall continuously undergoes change and the original portrait of Lennon is long lost under layers of new paint. Even when the wall was repainted by some authorities, on the second day it was again full of poems and flowers. Today, the wall represents a symbol of youth ideals such as love and peace.
There are tons of photos all over the internet of it, these are mine. I will be getting them printed and framed soon :)
(there's a little bit of space invader in there, too! although i'm not sure if it's authentic?)