Stay at this Mandan, North Dakota hotel featuring the Bismarck area's largest in-door waterpark and full-service convention facilities. The Best Western Seven Seas Hotel & Waterpark near Bismarck, ND is conveniently located with easy access to the North Dakota state capitol in Bismarck, Fort Lincoln State Park and the renowned Hawk Tree golf course. This hotel boasts an award-winning restaurant, casino-style lounge and fitness facility, perfect for both business and resreation travelers to the Bismarck area. Hotel amenities inc ...