birch tree wallpaper -- I prefer the light trees on dark paper, but this is lovely also. I'd still use either (dark vs light base) as an accent/separation wall between rooms
Removable wallpaper for entry hall or accent wall? Banish Bare Walls … Even in a Rental: 10 Sources for Removable Wallpaper
Animal wall paper designed by a Parisian design studio called Minakani Walls and apparently each pattern will only be manufactured 100 times.