Tropical Islands Resort is an artificial tropical resort in Krausnick, Germany. It is said to have the world's largest tropical indoor pool which can accommodate up to 8,000 visitors a day. It is also the world's largest indoor waterpark. The resort is located in Briesen/Brand, part of Halbe in Dahme-Spreewald, Brandenburg, Germany, about 60 km (36 miles) south-southeast of Berlin. It opened on December 19, 2004. The resort has an exotic environment with rain forest, beach, artificial sun, palm trees, orchids, and birdsong. The air is kept at a warm 25 °C (77 °F). Tropical Islands is open around the clock, every day of the year.