Wi-fi clustering without cables From my point of view, all Wireless networks are cabled to something, Router/VLAN or subnet. Am trying to build a local network system that is distributed wirelessly, For example one Router in Region-A(100 meters distance) can connect to another Router in Region-B(100 meters distance) to form a single network system, in a way that all devices connected to this network can share data. I know someone might say that the routers need some physical contact/access in order to form that single network system but i've heard that Facebook is doing it! Facebook is distributing it's data connection using planes and i assumes the planes are not wired to anything. Please correct me if am wrong.

You can do this several ways. Probably the easiest is to get a wireless bridge and use directional antennae on both your WAP and wireless bridge.

For such a short distance, It may be better just to extend the network with fiber.