Poland. Silesia. Katowice. Children playing on dinosaurs. Silesian Zoological Garden, founded in 1954, is situated in the Katowice and Chorzów districts and covers over 47.6 ha within the Silesian Central Park. The dinosaur valley contains full-scale reconstruction of 16 large dinosaurs, the remains of which were found by a Polish expedition in the Gobi desert. 10.05.91 © 1991 Didier Ruef ..