This bathroom is upstairs, tucked into a dormer. You can see the adjacent roofs in the mirror reflections.
Reflections like these can be controlled in the Material Properties, and displayed using camera specifications. PBR views like this one do a good job representing reflections in mirrors, and also reflections on shiny surfaces like counters, porcelain, and even metal. Other benefits of this rendering technique are high quality shadows and lighting, all combined with real-time rendering. This means you can navigation your scenes in front of a client or home owner and it will look as good from each angle.