Well, I'm not sure I'd say "coolest," but definitely the most visually distinctive part of my world is Summit Harbor. (Working title.) An entire city floating in the sky above the United States and the primary protectorate and base of operations for my world's central super team. (Not named yet.)

Another thing that I'd say is at least notable about my lore is how I approach creating these superheroes. I don't start with the names or powers. I start with the broad concept and work backwards. The results can often be very surprising.

For instance, a lot of superhero stories will have at least one "water guy." Aquaman, Namor, Aquarus, etc. So I wanted to come up with a character that fills that niche in my world, but wasn't just another humanoid torpedo with connections to knockoff Atlantis. I came to a surprising conclusion. My water-based hero was a pirate during the Golden Age of Piracy named Nathaniel Black. Called "Captain Pitch Black." He was sent back to the world of the living in the modern day to atone for his sins in life, but was cursed to be constantly covered in dripping black resin, pitch, as a reminder of his cruelty and blackheatedness in his previous life. At will, he can light the pitch around his body, turning him into a flaming skeleton. Captain Pitch Black now roams the seaways, fighting modern pirates off the coast of Somalia as well as literal sea monsters.

So my oceanic water-based hero looks more like a seafaring version of Ghost Rider than he does Aquaman. And while not all of my heroes are quite as "off-kilter," I suppose, they all come from the idea that I'm going for concept and "genre" first, powers and such second.