I think so but i'm not 100% sure though but the person who posted the picture did say they were in an area called Beaver Valley which would be accurate to where these exhibits are.
I do know that these grottos were home to Kiska* a Kodiak bear in the late 1990's and early 2000's and it also held Sloth bears before they moved to the grottos where the andean bears are currently before moving to Asia Trail.
^This is a link to a photo from back in 91 and the animal they're looking at is what I believe is a Malayan Tapir. Tapirs are one of my favorite animals but sadly I was born around the time the zoo started to lose a lot of cool species like Tapir so I wasn't able to see it.
This person doesn't have a photo album of the zoo but they do have one of DC in 91 with some pictures of the zoo if once again you would like to see.