After two years of planning and completion, the large outdoor sculpture called "Tiger and Turtle – Magic Mountain" opened to the public in November 2011.
Since then, it has been perched on Heinrich Hildebrand Height, a 30 m (98.4 ft) high mound of zinc slag south of the German town of Duisburg, where it can be seen from afar. At a height of 45 m (147.6 ft) above ground, visitors can enjoy the breathtaking view over the landscape of the Western Ruhr.
The plan of the "roller coaster for pedestrians" was created by Heike Mutter and Ulrich Genth, two artists from Hamburg.
Structure
The supporting structure consists of spatially precambered main beam pipes lying on 17 built‑in steel columns.
Cantilevered cross beams, on which the 1 m (3.2 ft) wide walking surface made of gratings is mounted, are attached to the pipe on both sides. The span lengths of the main beam pipe vary from 7 m (22.9 ft) to 15 m (49.2 ft).
The irregular column arrangement is based on the results of research by structural engineers from Berlin, optimizing the structure's behavior concerning deformation and vibration. Horizontal vibration dampers were installed in significant span areas.
| Structural Engineering | ifb frohloff staffa kühl ecker, Berlin, Germany www.ifb-berlin.de |
| Geometry | design to production, Arnold Walz, Stuttgart, Germany |
| Artists | Heike Mutter and Ulrich Genth, Hamburg, Germany |
| Architect | bk2a architektur, Köln, Germany |
| Investor | European Capital of Culture Office, Duisburg, Germany |
