About the book: 2012 / If you are attracted by the thirst for discovery, the eternal desire inherent in man to step on the shore of a mysterious island where no one has ever been, to see with your own eyes traces of forgotten ancient cultures or meet unprecedented animals - go to the mysterious and wonderful underground world of Central Russia. The author of this book, professional cave explorer and local historian Andrei Aleksandrovich Perepelitsyn, who collected unique information about the “Underground World”, claims that this “parallel “The world is only ten percent. Moreover, the caves of the Caucasus and the Pyrenees, where speleologists compete, are often much better known than the dungeons near Moscow or Oka - a true “terra incognita” awaiting discoverers. Popular science publication.