Lots of People visited The Americas, China, Japan etc—but, like the Vikings they did little to the place. The Spanish came and brought religion and western culture to the Americas. What ever you say, Roman Catholic Church was a whole lot better that the rip out the hearts cults of the Maya and Aztec. Christobal Colombo did a great service to the peoples of the New World and the cultures of the whole world. Ask yourself this question. What would the Americas have been like is the Moors had discovered the place?
As you might be able to tell, not fond of Europeans. (and I'm Irish/Scottish/Welsh with a bit of German)
Very good point, and scary too!