I just visited the Sedgwick County Zoo yesterday, and I'd estimate that less than 10% of the zoo is outdated and in need of improvement. For example there are spectacular exhibits for lions, tigers, meerkats and gorillas, as well as massive walk-through Australian and South American complexes. I was blown away with how terrific this zoo was, and there are ambitious master plan posters all over the trails detailing the future improvements such as a new 4-acre elephant complex, an aquarium, an addition to the fantastic "Jungle" rainforest building, etc. This zoo is definitely in my top 10 for North America, and by the end of August I'll have seen just about every one of the top 60 zoos in the United States. There is nothing earth-shattering at Sedgwick County (like "Congo Gorilla Forest" at the Bronx) but it is so consistent and impressive that I'd love to revisit it again in the future. What a hidden treasure in the middle of America!