I'm curious at what point ones property line ends vertically both above and beneath ground level. People are able to build structures in both directions at grea

I'm curious at what point ones property line ends vertically both above and beneath ground level. People are able to build structures in both directions at great depths and elevations in the cases of mines and skyscrapers. Perhaps in the case of airplanes flying or building a subway system there is just some sort of easement or eminent domain ruling applied? If anyone has some resources on this topic, I'd be interested in reading them.