Open Culture. has images and discussion of J. R. R. Tolkien’s art. And they have links to see more at The Tolkien Gateway. “Beyond perusing the images in the Tolkien Gateway, you’ll also want to have a look at Wayne G. Hammond and Christina Scull’s book, J.R.R. Tolkien: Artist and Illustrator. Some Tolkien enthusiasts will, understandably, prefer to keep their personal visualizations of the Lord of the Rings universe unsullied by non-textual imagery such as this, but if all of Peter Jackson’s megabudget film adaptations didn’t sully you, then Tolkien’s mild, almost rustic but still solemnly evocative drawings and paintings can only enrich the Middle-Earth in your own mind.”