Where is the 2nd your sanctuary location in Earthbound?

In EarthBound, the second sanctuary location is called "Giant Step." It is located near the town of Onett and can be accessed after obtaining the Sound Stone from the first sanctuary, the "Your Sanctuary" located in the same area. Players must navigate through a cave to reach Giant Step, where they will encounter a boss before accessing the sanctuary itself. Once completed, players will record the location in their Sound Stone.