When the Zoo opened in 1828 it housed a collection of exotic animals that were studied by eminent scientists of the day. Only later, in 1847, did the Zoo open its doors to the public to become the most famous zoo in the world. Among many world firsts, the Zoo opened the first reptile house (1849), the first public aquarium (1853), insect house (1881) and childrens zoo (1938). Today the Zoo looks after 650 animal species, of which 112 are listed as threatened. The Zoo is spread over three areas of garden linked by tunnels and bridges; a recommended route guides visitors around the grounds. London Zoo is open every day except Christmas Day.
