A Minnetrista home known for its unique design and welcoming atmosphere draws visitors, many of them strangers, who sign a special guest book. • Tenant Melody Harris has lived in the 3,600-square-foot house for 14 years and immediately knew the home would be perfect for her. • The house, owned by Ronald Hietala, features unusual architecture made of foam, original 1960s gadgets and is surrounded by nature on over 8 acres of land. MINNETRISTA, Minn.