Stock Photo: Fireworks display during opening of the walkable landmark sculpture in the shape of a roller coaster, ´´Tiger & Turtle – Magic Mountain´´ by Heike Mutter and Ulrich Genth, Angerpark on Heinrich_Hildebrand_Hoehe, mining waste tip, Duisburg, North Rhine_Wes. Fireworks display during opening of the walkable landmark sculpture in the shape of a roller coaster, ´´Tiger & Turtle – Magic Mountain´´ by Heike Mutter and Ulrich Genth, Angerpark on Heinrich_Hildebrand_Hoehe, mining waste tip, Duisburg, Nor