02/07/2015 06:56 BST | Updated 02/07/2015 06:59 BST

24 Unexpected Things Found Aboard Cruise Ships

Mental Floss is back to bring you yet another incredible list of things to sharpen your mind! Host John Green, of 'Fault In Our Stars' fame, takes us through 24 unexpected things you can find aboard cruise ships.

Did you know they can have skydiving, ziplines and Alcoholics Anonymous meetings?