Cracked pearl is a map I started thinking about after replaying Halo wars “Arcadia city” and thought “What does it look like now”. The city was destroyed in a covie attack and would never bee returned to. Basically a burned down city that is now re obtained by nature. The fires have gone, the ash and dead long gone, its nature, reclaiming her.
The map would be similar to this
Picture
Some of the highways are still standing allowing for joy riding in a warthog pretty fun. Some towers have crumbled but the underground structure has been untouched, allowing tight cramp sewers to fight in for the close quarters
In the sky you can see infinity just floating there.
(In truth its not. At the current time a UNSC satellite is monitoring the planet and sending visuals to infinity to help prepare Spartans for a fight if there is one.)