I'm one of those who can specifically go on a travelling only because of an unusual place of residence:
A hotel on a tree, an air hostel or just a house on the fjord with a beautiful view.
This is a traditional hotel in Japan - ryokan, the floor in it is covered with tatami, and also balcony doors with bamboo bars. To sleep it is necessary on special mattresses which cover fairies while you are at a supper : ) The bathroom is not present, lodgers go to the general - ofuro. Staff in the kimono. Also the main feature of accommodation here is the traditional breakfast and lunch kaiseki. This hotel is remembered also for the fact that it has hot springs, onsen, right by the mountain river.