At 1,3 km, this free open-air 'gallery' is the longest remaining original stretch of Wall in Berlin. The 'East Side' started out as a favourite haunt of graffiti artists in 1990 (note that the paintings are on the eastern, formerly deadly side of the Wall), and has since become a magnet for tourists as well as an important cultural landmark. Many of the original artworks have recently been re-painted by artists from all over the world. There are plenty of places to stop for refreshment along the banks of the river Spree as you explore over 100 compelling works of art. Mühlenstr., www.eastsidegallery.com