The Multimar Wattforum is the central national park information centre of the state of Schleswig-Holstein and a visitor magnet with over 3 million guests so far. In order to ensure permanent attractiveness, the operating concept provides for modular extensions (reattractions) at intervals of about 5 years. The project proposed here aims to make the outdoor area of the National Park Centre more attractive. An outdoor facility for the Eurasian otter (Lutra lutra) with buildings and enclosures, land and water habitats, adventure exhibition, compensatory measures and educational offers for all target groups is planned. The otter is an ambassador for the idea of protection in the National Park region. As an outdoor offer, the fishing otter facility increases the importance of the Multimars as a tourist destination and makes the facility interesting for various tourist target groups. The importance of Multimars as a tourist lighthouse project in the state of Schleswig-Holstein is thus further strengthened.