The Senckenberg Naturmuseum is a natural history museum in Frankfurt. Opened in 1907, it is Germany's second largest natural history museum and boasts the largest exhibit of large dinosaurs in Europe. The dinosaur collection is a major tourist attraction for visitors from all over Europe. Among the major attractions we see the Tyrannosaurus rex, an original of an Iguanodon and the Triceratops. There are also examples of a Parasaurolophus with its characteristic tubular crest, a fossilized Psittacosaurus, with bristles around the tail and with fossilized stomach contents still visible and an Oviraptor. The Senckenberg also has a large collection of animals from every epoch in the history of the Earth. Many of these come from the Messel Well (a mine not far from Frankfurt in which a large number of fossils have been found making it an important reference point for geology and science studies), including a predecessor of the modern horse, who lived 50 million years ago and less than 60 cm high. A particular treasure is also the only dinosaur fossil in the world to have preserved flaky skin. In addition, the museum contains the largest and most diverse collection of stuffed birds in the world, with around 2,000 specimens. There is also the only reproduction in Europe of the famous Lucy, the almost complete skeleton of Australopithecus.