London Zoo is located within Regents Park, and it is the oldest zoo in Europe opened in 1828. In the start they used use if scientific activities, but in 1847 it was opened for the public. Then it also had an aquarium, which was the first aquarium in the world. Inside the ZOO you can today see more than 704 species.
Useful London Zoo information:
Metro: Camden Town
Opening times: 10:00-16:00 (stays open until 18.00 in the summer)
Entrance fee: £18.60 (adults)