The Mediterranean climate - long dry summers, mild winters and rain in spring and autumn - is found on only 5% of the Earth’s surface, in five regions. These are present in the Jardí Botànic de Barcelona (Botanical Garden of Barcelona), opened in 1999 and located on the hill of Montjuïc. Arranged over 14 hectares of gently sloping ground are botanical collections from Australia, Chile, California, South Africa and the Mediterranean basin, including the Canary Islands.

The area has been designed by the architects Carles Ferrater and Josep Lluís Canosa, the landscape architect Bet Figueras, the biologist Joan Pedrola and the horticulturist Artur Bossy. Within what seems to be a large, natural amphitheatre, the planting is organised geographically, as well as being grouped for ecological affinities. The designers took advantage of the terrain in order to create the areas and roads while avoiding excessive earth movement.

Notable among its objectives is the conservation, documentation and dissemination of the natural heritage of Catalonia. For this reason, the grounds also houses the building of the Institut Botànic de Barcelona (Botanic Institute of Barcelona), which has an important library and one of the largest herbariums in Catalonia.
Montjuïc botanical garden exists side-by-side with the Jardí Botànic Històric (Historic Botanical Garden), opened in 1941 in the Foixarda area. Its location promotes the growth of the Euro-Siberian species of plants. In 1986, it had to close because it was affected by the construction of the Olympic facilities, although it reopened in 2003.