The Stirling Castle is one of the most important castles of Scotland. It is atop of a hill, in a strong defensive position for controlling the River Forth. Below the west side of the castle's hill, there is the King's Knot, a 16th-century formal garden. In the satellite images of Google Earth we can easily see this garden, that today consists of earthworks with a geometric layout. Using SunCalc software, which is a software giving the directions of sunrise and sunset on satellite maps, we can study the orientation of this Knot in relation to the apparent motion of the sun.