Yes, Wood! This play on words for the Fungal Network that lives and thrives in a forest floor that performs quite similarly to what we perceive of the human World Wide Web by sharing resources between the root systems of the trees in the forest. The fungal forest provides an integral part of the thriving environment of trees and provides a much needed symbiosis between all the organisms living in the forest. A healthy forests starts beneath our feet, beyond our visual world where we can see and learn from this marvel.
To learn more, Google Wood Wide Web or look up the Wikipedia article.