The Northern Lights, also known as aurora borealis, are most frequently observed in countries around the Arctic Circle, particularly in Norway, Sweden, Canada, and Alaska (USA). This natural light display occurs when charged particles from the sun interact with the Earth's magnetic field, producing stunning visuals in the night sky. The best time to view the Northern Lights is during the winter months when the nights are long and the skies are dark. Tourists often travel to these northern regions specifically to experience this breathtaking phenomenon.