The Sea of Tranquillity is a leading health spa retreat located on the moon. As well as the usual facials, manicures and chemical peels, the Sea of Tranquility offers some more unusual treatments for the discerning client. The majority of treatments are for physical diseases or injuries, such as "Chlamydia ", although there are facilities for dealing with mental or psychological problems such as "moping", "demonic possession" and "borderline lunacy".