Dr. Earnhardt's Mansion is a house that is located on a cliff side on the west of Rook Island. The mansion was constructed by a British business tycoon just after the end of World War I, and was then abandoned when the tycoon decided to invest in the Baltimore And Ohio Railroad. The mansion was then inhabited by Dr. Alec Earnhardt until his death. The mansion is where Jason finds Daisy and where he takes each of his friends as he rescues them. They are allowed to stay with the doctor's permission.