The HARCC is a multi-faceted facility that features the finest collection of Black Hills historical documents in the world. It serves as a hub for educational and entertainment activities where classes, workshops, conferences, meetings and other gatherings are held. It is designed to be a place for research, fellowship, inspiration and lifelong learning. Hours are Monday through Friday, 10 a.m.-4 p.m. Its sister museums are the Adams Museum, the Historic Adams House and the Days of ’76 Museum.