The London Zoo was a zoo in London, England.
The Doctor, Amy and Rory landed in the Amazonian forest in 1827. They met the naturalist Edwin Garrot, who was trying to bring back animals for the opening of the London Zoo the following year. (AUDIO: The Eye of the Jungle)
In the 20th century, the Fourth Doctor and Sarah Jane Smith went to the London Zoo on the trail of a dying Pescaton. They noted that even the lions were afraid of the shark-like creature. (AUDIO: Doctor Who and the Pescatons)
Sui Sui was raised in the London Zoo. (IW: How to Play Four-dimensional Chinese Checkers, and Win)
Bernice Summerfield's time ring deposited her in the London Zoo during the Victorian era. Not knowing anyone in the city at that time, she went to the Diogenes Club, looking for Mycroft Holmes. (AUDIO: The Adventure of the Diogenes Damsel)