The entrance to the Grzimek House in Frankfurt Zoo. This zoo has an enormous collection of nocturnal animals, including many rare ones, such as Aye-aye, aardvark, kinkajou, prehensile-tailed porcupine and kiwi. This house also has a large number of small mammals, including otters, fossas, many marmosets and tamarins, rock hyraxes and even short-beaked echidnas.
