The Diomedes are famous as the point where Russia and America meet. They are little more than two enormous rocks jutting out of the Bearing Sea.
Believe it or not a small village of 150 people or so is on Little Diomede.
Now imagine the Diomedes riven with underground caverns, bunkers, missiles silos, laser emplacements, etc, etc.
That'd be a heck of short story, no?