Serena, set in the forests of northern Espoo, is one of the largest water parks in the Nordic countries, a family favourite in every season. Its ticketed indoor tropical hall stays warm year-round with pools, slides and a wave pool, while in winter the site becomes a ski centre with slopes and lifts nearby. With attractions for all ages amid a woodland setting, it makes an easy and fun day out from Helsinki and a reliable choice for families visiting the region.