Cabeza de Vaca was a Spanish explorer who sailed to North America from Spain, leaving in 1527. He traveled from Florida to Texas on a raft, then walked from Texas to Mexico City. He also explored the Paraguay River in South America. De Vaca and his fellow travelers were the first Europeans to see the bison or American buffalo.
Coronado was a Spanish ruler, explorer and conquistador. He was the first European to explore North America's Southwest.
Cortes was a Spanish adventurer and conquistador who overthrew the Aztec empire and claimed Mexico for Spain. He sailed to Cuba to the Yucatan Peninsula to look for gold, silver, and other treasures. Hearing rumors of great riches, Cortés traveled inland and "discovered" Tenochtitlan, the capital of the Aztec empire. He then brutally killed the Aztec emperor Montezuma and conquered his Aztec Empire of Mexico, claiming all of Mexico for Spain in 1521. Treasures from the Aztecs were brought to Spain, and Cortés was a hero in his homeland. Cortés was appointed governor of the colony of New Spain, but eventually fell out of favor with the royals. He then returned to Spain where he died a few years later.
Ponce de Leon was a Spanish explorer and soldier who was the first European to set foot in Florida. He also established the oldest European settlement in Puerto Rico and discovered the Gulf Stream (a current in the Atlantic Ocean). Ponce de Leon was searching for the legendary fountain of youth and other riches.
Alonso Alvarez de Pineda was a Spanish explorer and map-maker. De Pineda sailed for the Spanish Governor of Jamaica, Francisco de Garay, who sent him to explore and chart the Gulf Coast from Florida to Mexico in 1519. Captain De Pineda and his crew were probably the first Europeans in Texas, claiming it for Spain.