The Hammaphore System is the secret underground network that connects all Hammaphore trees on the planet. Distances inside the System are 1/100th the size of distances in the outside world. This means travel inside it is really quick and efficient.
Tunnels and intersections are very well signposted, so it’s almost impossible for a System Traveler to get lost. When new Hammaphore trees grow, the signposts automatically update. Lighting in the tunnels is provided by natural soil phosphorescence, so no flashlights are needed.