DreamHack
(http://www.dreamhack.se/) is a lan gaming event which takes place in the elmia expohall, right next to the bathhouse of rosenlund. it is the world's largest lan party - last winter it had 12.782 attendees. it usually takes place two times a year in june and november. one can attend as both a visitor and by bringing their computer to the party.
The beach
The beach of lake vã¤ttern is one of jã¶nkã¶ping's prides. during summertime it is an excellent place to go swimming, playing volleyball or even attending a small free festival which is held there annually usually in august called 'vã¤tternfesten' (http://www.vatterfesten.se/).