The Crazy House, officially known as the Hằng Nga Guesthouse, is a uniquely designed building located in Da Lat, Vietnam. Designed by Vietnamese architect Đặng Việt Nga, the structure features unconventional architecture inspired by natural forms, including animals, mushrooms, and caves. Opened in 1990, it has become a popular tourist attraction, offering visitors a chance to explore its imaginative design and stay in themed rooms. The Crazy House is open daily from 8:30 AM to 6:00 PM, with entrance fees of 80,000 VND for adults and discounted rates for children.