Bathrooms are a bit more difficult when it comes to wallcoverings, since anything that you apply has to be able to withstand a good amount of moisture, heat and frequent cleaning. Vinyl wallpaper is definitely a potential choice, but double check with the store or manufacturer that it can withstand the wear and tear of daily bathroom use. In this bathroom, the designer paired a shell-inspired paper-backed wallpaper with tile, allowing for easy cleaning and maintenance.
You may find this photograph with a bit more detail to continue to research the product in your area.