Colorado has a rich and unique Hispanic heritage. Spanish exploration and prospecting in Colorado was more frequent than the records reveal. Between 1540 and 1542, Francisco de Coronado, a Spanish explorer looking for the mythical Seven Golden Cities of Cibola, may have crossed into Colorado. Old Spanish records indicate that as far back as 1598 Juan de Oñate reported gold discoveries in the San Luis Valley. These early Spanish expeditions usually traveled trails that Native Americans before them had worn into the deserts, plains and mountains. Native American typically also served as guides to European explorers.