Casa de Campo Parque also hosts the Madrid Zoo, which is among the biggest zoos worldwide with its impressive 20 hectares. Visitors can encounter a fantastic variety of species from all over the globe - 6,000 animals which belong to more than 500 different species, to be precise. The zoo includes an aquarium, a dolphin tank, exotic birds section, as well as the favourites of the children - elephants, giraffes, kangaroos, monkeys and many more.