The cave of trials is a place where Shinobi are sent to do advanced training. It is more of a test than anything, the sand inside this cave had a technique put upon it making the sand cause illusions. It is used to help young and old shinobi find themselves, as the illusions vary from person to person and have been known to kill.

A door is attached to the cave that only certain people given permission and the ability to enter may, if one can enter they will have a small vial of a special water that you sprinkle on the main boulder and it will roll out the way allowing passage..