This world is full of wonderful and strange things. But with modern technology it can feel sometimes like we have already seen it all. But for this video, we have managed to find things that have been so well kept, that you have probably never seen them before! From an underground city right under your noses, to a cutting edge technology invention that we have all been waiting for, here are 15 cool things that you will see for the first time! ► For copyright matters please contact us: top5sfinest@gmail.com