This is just a thumbnail, if you click it, you will get a bigger version, but you must click this link -> Fullsize (huge - 7793x4409 !) to get the full effect!
This is probably one of the coolest paintings that ever existed. Do yourself a favor and go to http://en.wikipedia.org/wiki/The_Garden_of_Earthly_Delights and read up on it. Its amazing. Hieronymus Bosch is an amazing artist and he did this when he was 40-50 years old. Do yourself another favor and make sure to look at the full size version! Way too many details and this is a huge painting.