Zurich has two official botanical gardens, both belonging to the University of Zurich. The old one, Arboretum, is now maintained as a park in the city center. When space became too tight in the mid-20th century, a new garden, Botanical Gardens or Botanischer Garten, was developed on the edge of town near the University. Since 1976, this has been the official Botanical Gardens of Zurich.
Unlike other Botanical Gardens, it is not formally laid out and many of the plants cultivated are wild species. There are some bubble-domed greenhouses and a water garden.