OH, YES — COLUMBUS DAY: Columbus, the size of the earth, and 4 Ezra. An appropriate post from a few years ago. Also, more recently, this: Hebrew, pepper, and Columbus. On the actual discovery of America, see the comments at the bottom of this post.
Incidentally, it has also been argued in recent years that Christopher Columbus was secretly Jewish. For this reason, Barbara Aiello thinks that The Jews can save Columbus Day (Times of Israel Blog). I blog, you decide.
I know Columbus Day was officially yesterday, but I just remembered to post on it now.