Swell-Air Hotel is an exclusive hotel in Springfield.
Marge's and Homer's third wedding should take place there. However, Homer mysteriously disappeared from his room on their wedding day, so there was no wedding. While Marge was crying in her room, Bart and Lisa tried to solve their father's disappearance. They found some keys with a keychain that has the initials S.B., leading them to Sideshow Bob, but the keys actually belong to Selma Bouvier.