I've lived in the Cleveland area my entire life (I'm 48). I have watched the Cleveland Zoo go through changes over the years and it keeps getting better! I made another visit not long ago and just love the elephant crossing they added. The wolf exhibit is still my favorite. The only thing I miss is the Zoo Lights they used to have during the Holiday Season.
Zoo has improved so much since the Metropark System took it over. Clean, affordable and very, very nice exhibits. A must see.