Inside the earth again, we see a sun, a void, and maybe planets. Inside those planets are other places, which it is also possible to travel to, if only you'll allow yourself to be shrunk appropriately (which will grotesquely distort the proportions of your features, and lead to some terrible nights in roadside hotels, unable to sleep, afraid of the future... you're going to have to keep traveling, keep shrinking, no way back, a lonely circus life for you).