Starfell Valley is an area of Mondstadt. It is considered the most diverse region of Mondstadt, spreading far from the tip of Stormbearer Point to the ends of the Whispering Woods. It is also home to the City of Mondstadt in Cider Lake. The area also consists of abundant lakes and tree variety.
The area is where the Knights of Favonius's duties primarily takes place, protecting locals and travelers alike with guards patrolling around the area.