Established in 1874, the Zoologischer Garten is one of the greatest zoos in the world, famous for breeding endangered species in captivity. Covering 11 hectares (26 acres) in an urban setting within a 7-minute walk of the railway station, it has some 4,500 animals of 600 different species. Trained elephants and sea lions perform tricks. The Vivarium is filled with everything from penguins to reptiles. Baslers call this attraction Zolli and often go here several times a year to see the "armored" rhinoceroses along with Japanese monkeys and gorillas. Ever seen a pygmy hippopotamus? This is one of the most kid-friendly zoos in Europe; the restaurant pavilion in the center even serves special meals for children.