WATCH: David Muir shares details about new Elephant Valley exhibit at San Diego Zoo

Designed to make visitors feel like they’re walking alongside the elephants, it’s the largest project in the zoo’s 109-year history.

​Designed to make visitors feel like they’re walking alongside the elephants, it’s the largest project in the zoo’s 109-year history.  WNT Designed to make visitors feel like they’re walking alongside the elephants, it’s the largest project in the zoo’s 109-year history.