I would say De Soto in 1540. He landed in Fl and walked the southeastern United States to the Mississippi River.
Or it might have been the Spanish explorer Lucas Vazquez de Ayllon around 1526.
James Cook is credited with being the first European explorer to circumnavigate and chart New Zealand.
Abel Tasman is credited with being the first European explorer to discover Ven Diemen's land (now Tasmania) and New Zealand.
Pedro Cabral was a Portuguese explorer and is credited for being the first to see Brazil
Magellan.
Garcia Lopez de Cardenas is credited with being the first European to see the Grand Canyon.
Christopher Columbus
For the Portuguese explorer, da Gama.Vasco da Gama is credited with being the first European to sail around Africa to India.
The first known post explorer of Georgia was Hernando de Soto, a Spanish explorer, who entered the area in 1540 during his exploration of the southeastern United States. He was searching for gold and other riches, and his expedition had a significant impact on the indigenous populations of the region.
Hernando de Soto
African Americans
Lucy
Ferdinand Magellan is generally credited with being the first explorer to circumnavigate the world.