The museum housing the largest open air ethnographical exhibition in Slovakia introduces the traditional building and housing culture and the way of life in Slovakia in the second half of the 19th and the first half of the 20th centuries. On the area of 15,5 hectares, it displays more than 140 housing, farming, technological, social and sacral building structures from the regions of Orava, Liptov, Kysuce-Podjavorníky and Turiec. It shows the variety of forms in the traditional building culture and the economic and social population distribution in the North-West of Slovakia.