The House of Tuzu

Tuzu is the tribe’s name for the island’s great central volcano. The ancients built a magnificent building in Tuzu’s name, containing mystical secrets for those who dare to approach.

The House of Tuzu is a community lot near the western shore of Felicity Island, one of the neighborhoods shipped with The Sims Castaway Stories. Like all community lots, it can be visited by using the travel map. Inside the temple there's a quite of lot of treasure (though only viewable) and a jug containing a green liquid that can turn the elder Sim into an adult. In the Shipwrecked and Single story, it is revealed that Winford Rhinehart knew about this place and was after it's gift of eternal youth. Once the temple is opened, Rhinehart will run inside and drink the liquid to become an adult. The protagonist can now choose Rhinehart's fate - banish him to make him dissappear forever or reward him by turning him into a toddler.