You would think , there you are floating along surrounded by water, who would think you need more ? Cruise ships , that’s who !
When I used to book land holidays customers would always ask where is the nearest water park ?, no need to hunt for that on the Norwegian Epic, you cant miss it !! Here are some of the pictures ti give you a taste
http://www.cruise.co.uk/cruise-guides/20-incredible-water-slides-that-will-blow-your-mind/
Take a look and see for yourself !!