The 57th Parallel is a circle of latitude located 57 degrees north of the Earth's equatorial plane. It runs through several countries, including Canada, Norway, Sweden, and Russia. This parallel is significant in geography as it marks a boundary in various regions and is often referenced in discussions about climate and ecology. In Canada, the 57th Parallel crosses through the northern territories, influencing the local climate and ecosystems. It is also notable for its proximity to the Arctic Circle, which affects the length of daylight and seasonal changes experienced in these areas.