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In page Poznań:

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Poznań Zoological Garden has two facilities. The Old Zoo is one of the oldest in Poland, established in 1874 just west of the city centre.[15] The large 116-hectare (290-acre) New Zoo was opened to the public in 1974, becoming second largest in Poland in terms of area. It is located on a hilly forest area with six large ponds at the eastern city's wedge of greenery, beyond the Malta lake. There is a dedicated and adored by children Maltanka mini-railway, that starts the route near the Śródka roundabout.[citation needed]