Was in Vilnius earlier this year and found this cheery building. Built by the sovjet authorities on top of a jewish cemetary and closed in 2004. Overall I found Vilnius a pretty nice city, lots of beautiful churches and buildings. Not very crowded with tourists either except some belarussian tour busses. This was in October though so probably not season. Nightlife was better than expected, I would recommened the club Kablys if you are a techno fan. Lots of cheap bars too.