In case you enjoy a bit of whimsy and don't necessarily stop that enjoyment at the end of the Middle Ages, you can have a look at this collection of fantastical animals. It's an online exhibition with text in German, but images will work in any language - and you'll see interesting critters from graphical artwork from the 15th to the 18th century.
Because we can all use some images of gryphons and dressed-up locusts, right?