* Juan Ponce de León: In 1513, Spanish explorer Juan Ponce de León became the first European to document mainland North America when he landed on the Florida coast during a search for the Fountain of Youth.
* Christopher Columbus: While Christopher Columbus never set foot on mainland North America, he made landfall in the Bahamas and other Caribbean islands during his voyages in the late 15th century, opening the door for further exploration of the Americas.
* Amerigo Vespucci: Amerigo Vespucci, an Italian explorer and navigator, explored the eastern coast of South America and parts of North America in the late 15th and early 16th centuries. His accounts and maps of the region helped Europeans understand the true nature of the Americas.
It's worth noting that these are just a few of the many explorers who contributed to the discovery and exploration of mainland North America.