Han Nga Guesthouse and ArtGallery, named for its proprietress, Dang Viet Nga, is also called the “Crazy House.” It embodies a fusion of Surrealism and Dada gone berserk. Han Nga Guesthouse and ArtGallery, named for its proprietress, Dang Viet Nga, is also called the “Crazy House.” It embodies a fusion of Surrealism and Dada gone berserk. Han Nga Guesthouse and Art Gallery. Hang Nga, daughter of former president, Truong Chinh who followed Ho Chi Minh, "above usual planning constraints"