I just came across this 1964 comic book cover art featuring Batman, Superman, and Robin surfing, and I had to post it! I've never seen this image before, but as a fan of both comic books and surfing, I absolutely love it! It's the ultimate surf race. This is the cover for World's Finest Comics No. 36, and I need to get a poster sized version of it!
Thanks to Geek Battle Royale for the tip!