San Diego Zoo

Listen for a moment. Under the chatter of the crowd there is a deeper layer of sound. Birds call from somewhere high in the trees. Water drips through ferns. Now and then, a primate whoops from across a canyon. The air smells of eucalyptus, damp earth and flowering shrubs. You are standing in a zoo, but it can feel more like a forest built on the edge of a city.

The San Diego Zoo sits inside Balboa Park, the large green heart of San Diego. The ground here is not flat. It is a series of mesas and steep canyons, cut by water long before anyone built a path. That shape matters. The zoo does not lay its animals out in neat rows. Instead, the trails dip and climb, and the habitats follow the folds of the land.

The story begins in 1915 and 1916, when Balboa Park hosted the Panama-California Exposition. This was a world's fair that celebrated the opening of the Panama Canal. Some exotic animals were shown during the fair. When it ended, a local doctor named Harry Wegeforth wanted those animals to have a permanent home. According to a popular story, he heard a lion roaring nearby and decided that San Diego needed a proper zoo.

Wegeforth founded the Zoological Society of San Diego in 1916. In the early years, the collection was small and money was short. The doctor was known for his persistence. He asked for donations, traded for animals and pushed the city for land. Slowly, the canyons of Balboa Park filled with enclosures, keepers and visitors. The zoo grew from a modest idea into one of the best-known animal parks in the world.

Here is something many visitors miss. Another figure shaped this place as much as its founder. Belle Benchley started at the zoo in a bookkeeping role in the 1920s. She later became its director and led it for decades. She is often described as one of the first women to run a major zoo anywhere. Under her leadership, the zoo built its reputation for scientific care and public education.

Look at the way many animals here are separated from you. In many places, there are no bars. Instead, you see moats, ditches, rock walls and glass. San Diego was an early leader in this open, moated style of display. The idea was simple. If people saw animals in settings closer to the wild, they might understand them better. Today this approach is common in zoos around the world, but it was a bold change at the time.

Now look up at the plants around you. This is the second surprise. The zoo is also a botanical garden, with a large collection of plant species from many climates. Palms, bamboo, acacias, orchids and cycads grow along the paths. Some plants are here for shade and beauty. Others feed the animals. Bamboo and eucalyptus, for example, are part of the diet for some of the zoo's most famous residents.

Those residents include koalas. The zoo has kept koalas for a long time and is known for one of the largest koala groups outside Australia. Koalas eat eucalyptus leaves, and the mild San Diego climate allows the trees to grow on site. If you find them, look closely. Koalas sleep for most of the day, curled into the fork of a branch. A small movement of an ear can feel like a big event.

Giant pandas have a special place in the zoo's history. For many years, pandas lived here on loan from China, and several cubs were born in San Diego. The original pandas returned to China in 2019. In 2024, a new pair, Yun Chuan and Xin Bao, arrived from China. Their return brought a new wave of public excitement, and the panda area is often one of the busiest corners of the park.

The zoo is divided into zones that represent different parts of the world. Africa Rocks recreates rocky African landscapes and includes penguins, baboons and leopards. Elephant Odyssey connects living elephants with the ancient animals that once lived in Southern California. Monkey Trails leads you through layers of forest, from the ground to the treetops. Each area has its own plants, sounds and smells, so walking between them can feel like crossing a border.

The zoo is also part of a larger organisation, the San Diego Zoo Wildlife Alliance. The same group runs the San Diego Zoo Safari Park, about an hour's drive to the north, where herds roam across wide open land. The alliance works on conservation science, including breeding programs for endangered species. It also keeps a collection of frozen cells and genetic material from many species, sometimes called the Frozen Zoo. It is a library of life, stored for the future.

If your legs are tired, the zoo offers other ways to see it. The Skyfari aerial tram carries visitors in small cabins over the treetops. From above, you can see the shape of the canyons and the rooftops of Balboa Park. A guided bus tour also loops through the grounds, with a narrator pointing out animals along the way. Both give you a sense of how large and how hilly this place really is.

Before you move on, pause where you are. Notice the sound under your feet, the shade of the trees and the animals you might not have spotted at first. A bird may be watching you from a branch. A lizard may be resting on warm stone. This place began with a few animals left behind after a fair. Today it holds thousands of lives, many of them rare. As you walk away, keep listening. The canyon is still talking.