The Serpent's Pass is a narrow strip of land between two large lakes, that links the Southern and Northern halves of the Earth Kingdom. It is one of the very few direct paths to the capital, Ba Sing Se. It is named after the serpent which guards the point where the East and West lakes meet. At this point the Serpent's pass for a short distance disappears under the lakes. All of this makes the pass feared in the Earth Kingdom. Most refugees refuse to use the pass and instead cross the lake by boat.