Zoos are one of the best attractions to check out in almost any city that you visit, so you might be interested to find out which cities house the very best ones. Below is a list of the 10 biggest zoos in the world, which takes into account not only the acreage of these zoos, but also the number of species and animals housed inside of them.
1. The San Diego Zoo
The San Diego Zoo, located in Balboa Park, San Diego, sits on 100 acres of land. In this space it holds over 3,700 different animals, which represent 650 different species, the giant panda among them. The San Diego Zoo pioneered the now-popular practice of providing animals with open air, cageless exhibits.