A Maryland couple vacationing in Punta Cana was found dead in their hotel room in the exotic Dominican Republic resort town, reports NBC Washington. Nathaniel Holmes, 63, and Cynthia Ann Day, 49, were engaged to be married and found on Thursday, the day they were due to return home; their bodies showed no signs of violence and a cause of death has yet to be determined. Holmes' sister said he'd told her a few days earlier that they were "having a great time." The mysterious deaths come in the wake of an American woman who said she was brutalized and left for dead at another hotel in Punta Cana. (More Dominican Republic stories.)