Wow, good, but tough, question. My initial, gut reaction says, "
Tear it down?!? How could you?!" As mentioned, the historian in me recognizes it is the only WPA project at the zoo (outside, I believe, of some stairs between the greenhouses) and, maybe next to Wade Hall, probably the park's most iconic exhibit. Flipside, any local Zoochatter knows that exhibit has never really been the same after they removed the horde of Rhesus macaques. (Sure, they are a "lab rat" of the scientific community, pretty common, and don't "fit" the "African arc" of the zoo, but they
were always entertaining to watch.) Considering Cleveland's harsh winter weather, I always thought a large troop of Japanese macaques (snow monkeys) would've been an acceptable alternative. (I know, not much different and it still doesn't fit the "African arc" of exhibits, but then again, neither does the neighboring Amur leopard.)
So, back to the original question - if it was done nicely, I'd be in favor of an expansion of the black rhino range. Expand the current yard and "bow-tie it" to include an adjacent, spacious white rhino range. I'm not sure how you could incorporate Monkey Island into the design; in my head, make Monkey Island the "midpoint of my bow-tie" and retrofit it so people could walk onto the island, using elevated boardwalks installed to overlook each side of the range? Otherwise, include a nice stone monument commemorating the location of historical significance.
@ gerenuk - I was fortunate enough to see the draft of the new masterplan at a CZS function last November. While I greatly respect Dr. Taylor and the Society, realistically, we'll be lucky if they get one, maybe two major projects completed by the time the next masterplan is submitted. (I'd be happy if they proved me wrong...)