Data Tunnels are found in Sector Five, linking the central dome to the four surface sectors (Desert Sector, Forest Sector, Ice Sector, and Mountain Sector). They appear as blue streams of data and energy, similar in appearance to the interior walls of a tower.

The tunnels originally lead to the way towers of the other sectors. After "William Returns", they lead to the empty space bordering that sector and Sector Five.

The tunnels connect to the other sectors via openings in the Celestial Dome. Jeremie can temporarily disable the tunnels to allow the Lyoko Warriors to leave Sector Five via their vehicles or the Skidbladnir. This was first seen in "Exploration".


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