The museum studies and documents the nature in the North-West of Slovakia, especially in the regions of Turiec, Orava, Kysuce and Liptov. It also highlights the history of the Slovak Museum Society and its members, emphasing the personality of Andrej Kmeť (1841 – 1908). The museum owns over 500 000 objects and is located in the first building of the SNM dating from 1908 and designed by Milan Michal Harminc. Museum was recently re-opened after huge reconstruction.