Have you heard about underground hideout? Do you know that those exist? Do you know one? Is it around your area? Or not? To those who did not know about it, yes, underground hideouts exist and it is everywhere. I’m pretty sure there’s even one in your area, you may do not know about it, but I’m pretty sure there is. It is one of the most fascinating secrets I’ve ever known. The architectural designs are beyond the top, there are many surprises to look forward to in every corner of the area. These used to be just as underground hideouts, but then some were now used as bunker for militaries. Do you want to know what and where these underground hideouts are located? Check out the list below.