HOLA—A rainbow bursts out of a catarata (waterfall) in an Argentine national park. It is one of 275 falls that make up the Iguaçu Falls, which spread over Argentina, Brazil and Paraguay. Andrea Robles—The Tech May. 9, 2016 Facebook Twitter Reddit Print HOLA—A rainbow bursts out of a catarata (waterfall) in an Argentine national park. It is one of 275 falls that make up the Iguaçu Falls, which spread over Argentina, Brazil and Paraguay. Andrea Robles—The Tech