Ever since childhood, Ellie had planned to move her clubhouse next to Paradise Falls. Carl promised to help her get there. After the two had gotten married and spent their lives together, Ellie died of old age before they could ever make their dream happen. Left with the task to make it there for Ellie, Carl travels to South America to find Paradise Falls.
Carl would eventually succeed in moving the house to the exact spot Ellie wanted, but chose to take the house back and rescue Russell, leaving the house behind in the proccess. Unknown to him however, the house landed back right next to Paraside Falls and remained there, fulfilling Ellie's dream.