The limestone main building of the Kassari Manor is home to the permanent exhibition 'Life on the island. Fire, water, air, earth.' which gives a glimpse into the everyday life and events of the people of Hiiumaa, but also leaves room for philosophical reflection and important turning points in the history of the island. Thousands of years of human life are presented here through the four primitive elements mentioned in the title. The exhibition features a large number of objects and in addition to well-known consumables, there are also some contemporary items that have been made on the spot.

The museum shop has a wide selection of handicrafts and souvenirs from Hiiumaa.