We have become accustomed to think of the Internet as essentially virtual, ie, as an intangible world that is not on any particular site, an ethereal and intangible medium. Andrew Blum, journalist, communicator and skilled in new technologies, reminds us that also has a physical network infrastructure without which it could not exist. Indeed, Internet works because there is a reality that supports: a real world and not just virtual, fact checked by specific people in good places in the world located facilities. This book is a unique chronicle of travel invites us on a journey through the history and geography of the Internet to show the material base that enables the digital universe.