If you could choose just one tour to go on from all of the parks including WDW, BG, SW etc....which one would you love to do? Have you actually done it?

Mine would be the Marine Mammal Tour at SW which we did last Christmas Eve. It was amazing...unforgetable moments for sure. I had tears of happiness many times throughout that day. I have a report about it in the trip report section if you haven't already read it.