Some of my ancestors came here from Cave City. They did not miss it. Said it was absurdly hot, what with the inner sun shining constantly even though it's the size of a beach ball. Sleeping was hard, even in the cave. They got fed up and caught a ride in a saucer, which dropped them off in Arizona. They said they were lucky to survive the trip, as the saucer crew was either badly hung over or maybe still drunk, and they flew too close to the inner sun. Said you don't dare fly very high or the gravity of the inner sun will suck you in. Anyway, after they narrowly escaped being roasted, they nearly froze to death their first few nights in Arizona. They eventually moved to Florida, where the nights are warmer.
They liked the lower gravity on this side. Instead of being on the inside of a hollow sphere spinning at a thousand miles an hour, they were on the outside. They were all short and stocky and powerfully built. The last of them died back in the 80s. Somewhere around here I have a camera one of them brought along but of course it's impossible to find film for it. A couple of my cousins ended up with all the photos, birth certificates and other documents. They are both crazy, so who knows what they did with that stuff. None of the Inner Earthers would go near Mammoth Cave. Wouldn't say why, only to stay the hell away.
The ancestors said Mothman, Spring Heel Jack, and many other such nuisances were from the inner world. Such mischief is highly illegal as we cause the Inner Earthers plenty of trouble without being provoked. Apparently every tribe has its knuckleheads.