Become a part of Prague's street art scene--Sign your name to the Lennon Wall
Somewhat off the beaten path at Grand Priory Square, The John Lennon Wall is street art worth going out of your way for. The Wall is owned by the Knights of Malta and has been covered in John Lennon and Beatles-inspired graffiti since the 1980s. Once a cause for conflict between young people and Husak's communist regime, the wall is constantly changing. Bring your own paint or permanent marker and become a part of Prague, however temporarily (the wall is painted over regularly).