It was located in Dubuque, Iowa at. Spent an about 45 min the casino where smoking is allowed - this is Iowa. We called for a last minute reservation and there was availability. We did the supper cruise. The customers are quiet, but they have the music really ramped up - annoying. Beautiful night. Located in Dubuque, this entertainment and gambling hub has free admission. Especially love its location right on the river!! The buffet is one of the best that I've ever been at. Guardar. This is picture of Twilight Riverboat through a window at Diamond Jo Casino, Dubuque, IA. This riverboat casino opened in and closed in This boat gave five hour dinner cruises on the Mississippi River. One of my favorite casinos. Diamond Jo Casino, Dubuque, Iowa, Estados Unidos Country Inn & Suites by Radisson, Dubuque, IA Pasa un día recorriendo las galerías en Riverboat Museum . It's the perfect place to go for an affordable and fun day out! When you're ready. Jan 10, - Diamond Jo Casino in Dubuque, Iowa is a nice land-based casino situated right off the Mississippi River. Aquí, podrás dar agradables paseos junto al río y disfrutar de sus. Guardar. . Pasa un día recorriendo las galerías en Riverboat Museum (museo) cuando viajes a Dubuque. Boarded at , left at 6, returned about 8.