Heres my idea i made for two years ago:
Wirlpool in Atquati
In this event a couple of pirates need
help from you to find a treasure. They want to take you on a long
trip around atquati, to follow a map. But before you can go on this
journey, you have to get a pirate saber, some food, and rum! When you
are traveling you suddenly see the water moving, and a big wirlpool
opens up beneath you. Then you get sucked down in the underwater
world. The residents need help to something. (needs more info)