When I had a fireplace I kept some on the mantel too. Don't have one at the new place though.
Coolest way I've seen is a friend has a very large Kodiak brown bear skull just set on, not attached to, a wooden chessboard where half of the square pieces are a dark walnut and the other half looked more like oak. When I first saw it, I said "Hey, that looks great, who did that for you". And he replied that he had just happened to set it on the chessboard, realized it looked great and left it that way. Its nice also in that you can pick the skull up and handle it, turn it around etc. Its been awhile but I think the chessboard was really a box where the board/lid hinged and you could store the pieces within.