H2Oasis Water Park (1520 O'Malley Rd., South Anchorage. 907/522-4420 or 888/426-2747. www.h2oasiswaterpark.com) is Alaska's first -- and only -- water park. Housed next to a medieval castle-shaped structure, this large indoor facility includes a pool that generates 3-foot bodysurfing waves, a 475-foot-long water-powered roller coaster, a 350-foot open flume slide, plus a pirate ship with water cannons and slides. H2Oasis is open daily year-round and costs $22 for a day ($17 for kids). The large pool and high ceilings at the University of Alaska Anchorage (2801 Spirit Way, off Providence Dr., East Anchorage. 907/786-1231. www.uaa.alaska.edu) are geared toward fitness swimmers. Your $5 admission to the UAA pool also provides access to the ice rink, weight room, saunas, racquetball courts, and gym.