Magnet Hill is the fifth Your Sanctuary location in EarthBound. It is located in a Fourside yard behind the Department Store, although it can only be accessed through a long foray in the Fourside Sewers from an entrance in the Dinosaur Museum. The Carrot Key can also be obtained in the Treasure Chest here.
Trivia[]
It is possible to simply skip this location after obtaining the Carrot Key and go straight to Pink Cloud.