Mentioned by La Jolla Mom
35 San Diego Tourist Attractions: Top Spots for Fun Sightseeing
"The most popular San Diego tourist attraction is the San Diego Zoo, located in Balboa Park. It is a truly special place in that every dollar you spend goes toward the care of the animals and various conservation initiatives. Over 4500 species of plants, many of which are prized exotics, help replicate the natural habitats of the 3500 animals who call these 100 acres home."