I find giants to be very interesting, and there is much evidence that true giants lived in the past. There are many stories of finding human skeletons anywhere from 9 feet tall to an unbelieveable 25 feet tall!
Now it is true there have been hoaxes, but their have been documented cases by educated and learned scholars.
There are many giants shown in ancient art such as these:
The Bible clearly states that there were giants in the days of Noah. And the Bible mentions giants after Noah's time as well. So I do not think it unusual for ancient art to show giant men.