|“||Of all the places she saved, Angel Crater was her favorite and her least favorite. Now Alice was sleeping there, oblivious to the death, destruction, and hope that took place two hundred years ago. Alas, no one knew.||”|
Angel Crater is a crater on the border of Nebraska and Kansas that is 74.5 mile wide.
Not much is known about the history of Angel Crater other than it is one of the larger impacts made by the Sky-Rain. In the first book, Kathryn Janeway hints that something of importance happened there, but doesn't elaborate.