If you like music you should try the jazz club Village (http://www.village.nu) or the new concert hall (http://www.vmu.nu/pages/V...) tickets at Västerås tourist office housed in the same building, just a short walk from the railway station. Sadly the Village jazz club has recently closed due to financial problems, hopefully it will resurrect itself, but almost certainly not in its old building.
ArosFortet (http://www.arosfortet.se) is an indoor adventure facility challenging creativity and cooperation in group exercises. From city centre follow Kopparbergsvägen to the north, cross E18, then on the righthand side about 2 km walking distance from city centre.
There is a quite new bowling facility with a restaurant on Torgatan 1 in the city centre. Book in advance especially on Friday and Saturday evenings.
Kristiansborgsbadet is a bathing facility with a traditional 25 m pool and a separate section with moist and dry sauna, and cold bath Romerskt bad. Recommended.
Djäkneberget close to the Cathedral has a nice park featuring hundreds of stones with inscriptions quotes and names of people from the enigmatic Sam Lidman that founded the park in the 19th century.
If you have kids try Lögarängsbadet west of Västerås a couple of kilometers.
If you have half a day or so and transportation is arranged, you can visit the silver mine in Sala about 32km to the north on 67. Just follow the signs to Sala and the "Silvergruvan" is on the left. They give tours each day down into the mine. It's quite an experience both for adults and kids.
