Cave City is a state of The Commonwealth of Kentucky and was the base of a group of survivor communities in south-central Kentucky, including nearby Horse Cave, Glasgow, Mumfordville, Edmonton, Smiths Grove and communities along Nolin Lake and Barren Lake, as well as Mammoth Cave, where many area residents took shelter from radiation in the days and weeks following Doomsday. It is not a country per se, but a loose confederation of towns, with a total population of 7,000 people. The confederation also had alliances with fellow survivor communities around Lake Cumberland and in former Portland, Tennessee.