Top 22 most popular water parks in the world
Tropical Islands, Germany
Keep a close eye on your companions in this fun-filled resort as it's enormous. Tropical Islands is based within a gigantic dome that used to be an airship hangar. It's so big you can even go on a free-floating balloon ride for a bird's eye view. With a rainforest area featuring over 50,000 plants, white sandy beaches and swaying palm trees, it's easy to forget you're only 40-odd-miles from Berlin. Thankfully you don't need to do it all in one day as you can stay in the resort.
