"City Under the Sea" from My Greatest Adventure vol.1 #15 (DC, 1957) by Jack Kirby
Best known for debuting Doom Patrol with issue 81, the world's strangest heroes represent a very small fraction of what the book did, i.e. short tales usually narrated by the adventurers who lived them. Those early issues featured work by Wally Wood and Jack Kirby, and you know how much I'm a sucker for the latter's work. After all, he's one of only a few artists who have their own clickable label on this blog!