Sir Francis Drake traveled around the world, because Queen Elizabeth hired him to go and raid South American Ports. He sailed around the southern tip of South America, and began going north; possibly as far as the Canadian/American border, looking for a way to get through the continent so he could get back to England. When he couldn't find a way through, he sailed West, going completely around the world.
To explore new land and because queen elizabeth the first hired him to.
Because he anted to find out other places around the world
Because hes cool
He was a mental drugged up mentalist
Because he likes traveling