Why do people go to the zoo? Although this may seem like a very straightforward question, the answers to it differ from one person to another. You may that you go to see the animals that you love, to learn about them, or just to pass time when there is nothing else interesting to do, really.

Well, no matter the reason, zoological parks around the world attract thousands of visitors. And, some of the oldest zoos in the world are still open until today, providing a variety of educational and recreational programs for their guests.

This list is brought to you for a reason, so join us to learn as much as you can about the nine largest zoo parks and gardens that care for your favorite animals and even breed some of the most critically-endangered animal species.