Even though most people visit Vienna for its rich history and cultural heritage, to get a full picture of the city, you should also see it by night. Contrary to what some might think, after dark Vienna is a very lively place, especially if you go to Innere Stadt and in particular the district described as the Bermuda Triangle. You'll see many party-goers roaming the streets, going from one club to another. Popular clubs in Vienna are Badeschiff – a barge on the Danube transformed into a swimming pool and recreational venue, which during the nighttime becomes a trendy club. Chelsea, Vienna's legendary rock club, and Flex have the best sound systems in town.