What regions were explored by Coronado, de Soto, and Ponce de LeÓn?

Juan Ponce de Leon is thought to have accompanied Christopher Columbus on his voyage to the New World. He also explored present-day Puerto Rico and Florida coast. Francisco Vazquez de Coronado discovered the Grand Canyon and other famous landmarks in the American southwest. Hernando de Soto explored Florida and was the first to discover and cross the Mississippi River.