Hang Nga guesthouse, popularly known as the “Crazy House”, is located in Dalat, Vietnam, at 1,500 m above sea level.
This unconventional building, described as a “fairy tale house”, resembles a giant tree with weird sculptures such as spider webs, caves or animals. The crazy concept belongs to Dang Viet Nga, a Vietnamese architect who had decided to materialize a personal project designed for his PhD. According to Nga, its innovative architecture with non-rectilinear shapes was inspired by the work of Antoni Gaudí. In 1990, he transformed the building into a guest house and opened to paid visits by tourists. Today, people who want to visit this surreal house even have the option of spending the night.
Because the official site isn’t translated into English, you can find more information here.