In Venezuela, where the Catatumbo River meets Lake Maracaibo, there is a lightning storm that seems to never end. For about 300 days each year, cloud to cloud lightning strikes up to 280 times per hour. Even when the weather in surrounding areas is excellent, there is often a storm over this lake. Locals say the lightning is visible from up to 400 km away. The storm is more than just a curious natural phenomenon, though, because ships have been using it to help them navigate for ages.