London Zoo is one of the oldest zoos in the world. It was designed and built so people could ....study... wild animals. At first, there weren't many animals and only members of a special science club could visit it. Then, after 19 years the zoo ...let's....people buy tickets to come in. That happened 170 years ..ago..... The zoo is in the ...center..... of London, in a large park. It has many old buildings, which ....still.. have animals in them. There is an elephant house, a giraffe house and a penguin beach, which has a famous old phone box as well ..as... the penguins. People can see something like 20,000 animals in London Zoo. The zoo had .a.. few animals that are now extinct in the past, too. Now, thereare lions, polar bears, camels and many..unusual.. animals, as well as special places for birds, fish, insects and snakes. London Zoo is famous ....everywhere.. around the world, and at the ... moment. one million visitors go to see it every year.