Hang Nga Guesthouse, Crazy House, Đà Lạt, Vietnam

Furniture inside the rooms is handcrafted—and sometimes even built into the rooms themselves—to match the rooms’ nonlinear, organic shape. Stone decorations throughout the house depict animals such as bears, giraffes, frogs, spiders, and ants, along with natural elements such as mushrooms and spider webs. Stairways and hallways inside the building are designed to resemble tunnels and caves.
Tourism use
To help alleviate the financial burden associated with what was essentially a personal project—having accumulated upwards of VND 30 million in debt—Nga expanded the building into a guesthouse, and opened the house to paid visits by tourists in late 1990. As of 2010, fees for visits to the guesthouse were VND 30,000 per visit; room rates ranged from VND 290,000 to 630,000 per room per night for Vietnamese, and from $29–63 for foreigners.