I read your great trip report and got some fantastic ideas. In addition, since I only have a day and a half, after diving for a week, to do one or two really special things that's what I need help with. The Nekton will take us to the ruins or the zoo. Is it worth the trip? We were thinking of cave tubing, but wanted a half day trip instead of the full day since we're all going to be relatively tired. Nobody offers a half day.