Multiple choice general knowledge science & technology What Spanish explorer "discovered" the Grand Canyon in 1540? Hernan Cortes Garcia Lopez de Cardenas Juan de la Cosa Vasco Nunez de Balboa Reveal answer Fill a bubble to check yourself B Correct answer Explanation Spanish explorer Garcia Lopez de Cardenas, a member of Francisco Vasquez de Coronado's expedition, became the first European to see the Grand Canyon in 1540.