The house was renovated by the donations of locals, Institute for the Protection of Cultural Heritage of Slovenia, Kranj and furnished in collaboration with Gorenjska Museum, Kranj, which also contributed some of the exhibits. The museum opened to the public in 1991, and has been managed since 1997 by Gorenjska Museum, Kranj.
It is a characteristic Bohinj streched out farmhouse in which the living quarters and farm buildings were combined under one roof. In the living quarters there is an open hearth kitchen in working condition, a hiša which functions as the central living room, and a kamra ('small room') for farm workers who are too old to work. In the attic is an ispa, where crops, tools and clothes were kept. The farm buildings comprise a stable, barn and litter store, where agricultural implements are exhibited. As in the past, further agricultural implements and accessories are kept in the barn.
Oplen House and its environs are also used as the venue for museum workshops for children, entitled 'Old children`s games' where children can practice milk churning and make butter or wash laundry as our grand grandmothers did.