Hang Nga Guesthouse is commonly called “The Crazy House”. Inspired by Catalan architect Antoni Gaudí, it combines the natural environmental features of the four seasons. It was designed by Dang Viet Nga, the daughter of former Vietnamese President Truong Chinh. The Crazy House resembles a giant banyan tree. Visitors enter through a huge hole in the tree and step onto wooden stairs, which they traverse to get to the many different styles of rooms. If you choose to spend the night, there are all kinds of different room options available.