On an outdoor area of 28,000 square metres there are other attractions for children and adults, such as a climbing forest, a ground-nesting bird's nest with giant eggs and an exhibition about the painting Chalk Cliffs on Rügen (Kreidefelsen auf Rügen) by the artist Caspar David Friedrich.
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To use the earth's warmth to extract energy for heating, air conditioning and hot water, a geothermal system was installed in the outside area of the National Park Centre.
National Football League | National Register of Historic Places | National Hockey League | England national football team | National Basketball Association | National Science Foundation | National Geographic | National Trust | National Endowment for the Arts | National Geographic Society | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health | National Guard of the United States | National Collegiate Athletic Association | Hyde Park | Central Park | United States National Research Council | National Portrait Gallery | National Academy of Sciences | Indian National Congress | South Park | United States men's national soccer team | National Research Council | Royal National Theatre |