Serena, located in Luukki in Espoo, is the largest water park in the Nordics, open year-round indoors and with extensive outdoor facilities in summer. The indoor section includes multiple slides, a dedicated children's pool, jump towers, a hot tub and a flowing river. Summer brings outdoor pools, a sandy beach and longer slides set in a lakeside landscape. Suitable for all ages and swimming levels, with shallow pools and a play area for the youngest visitors. A restaurant, café and rental cabins are on site. Free parking and a 30-minute drive from central Helsinki make it convenient for day visits.