the heart of Regent's Park is London Zoo, a 36-acre conservation center
which houses more than 650 species. London Zoo's animal collection
includes invertebrates, reptiles, fish, birds, and small and large
mammals such as lions, tigers, gorillas, elephants, giraffes and
London Zoo is open every day - except Christmas Day - from 10am
until 4pm in winter; and until 5.30pm in summer.