My husband and I are planning to drive down to Tennessee on our zoo trip this year. Here is our itinerary: Sunday, May 13: Travel from Maryland to Knoxville, TN. Monday, May 14: Visit Knoxville Zoo. Travel to Nashville, TN. Tuesday, May 15: Visit Nashville Zoo. Travel to Chattanooga, TN. Wednesday, May 16: Visit Chattanooga Zoo & Tennessee Aquarium. Thursday, May 17: Travel back to Maryland. For those who have visited these zoos, I would love your input on how long it takes to visit them. I take it that Knoxville Zoo will be a half day zoo and that will give us time to travel to Nashville later in the day. I plan to spend most of the zoo hours (9 AM to 6 PM) at the Nashville Zoo and may even do one of their 90 minutes behind the scenes tour. Is Chattanooga Zoo and TN Aquarium doable in the same day? I can usually go through an aquarium quicker than I would a zoo. We would have loved to done Memphis too, but it was a bit too far to drive with the time we could get off.