Hello! I'm glad you noticed my construction. This is a somewhat simpler tunnel, for an older aesthetic without too much technology like roads or machinery, that's why it has these wooden and stone spirals; I think it might be a bit expensive because it requires a lot of cut stone, lanterns that use iron, glowstones, but especially the deep slate floor. I used it to cross a mountain, but I think it could have several uses. In any case, if you liked it, I really appreciate it!