Over this bay off the Caribbean Sea in northwestern Venezuela, lightning storms take over the skies almost every night of the year. This weather phenomenon is known as Catatumbo Lightning, named for the river that flows into the lake. Lake Maracaibo has the highest concentration of lightning on Earth thanks to a combination of heat, humidity, air currents and the mountainous landscape. At night, lightning strikes Lake Maracaibo about 28 times a minute for up to nine hours.