The small peak on the Volcano Visa Gift Card may be just the tip of one of the ancient volcanic mountains that forms this oceanic island. Islands in the sea are the tops of mountains whose bases are on the sea floor. Each eruption and lava flow increases the mountain’s height until it reaches the surface. The Hawaiian Islands were formed this way, and five volcanoes remain active, including Kilauea, which erupts an average of once every four years. Celebrate the beauty of sea islands with Volcano Visa Gift Cards.