A Shipibo canoe paddle (c.1940) from the Ucayali region of the central Peruvian Amazon. Used with a dugout canoe, of course. (All photos are clickable for a larger image.)
Another paddle from the Amazon, c. 1950.
A Tlingit paddle, c. 1880. If anyone can make out the design motif on this, please post to the Comments.
Three paddles from Maine, probably all Wabanaki and probably all carved with crooked knives. The top one must have been well-loved: note how it was mended with metal straps. The middle and bottom are long stern paddles.
The same three paddles as the previous photo. Interesting segmented extended grip on the longest one.