Sum Dux's Tunnel

Sum_Dux's Tunnel is one of the earliest creations on My Aircraft. It was created by Sum_Dux shortly after the server opened. The entrance is on the west side of Spawn, and the main branch runs straight west for thousands of blocks. Other branches of the tunnel exist, but less is known about them. One of the side branches connects to the underground area below the castle.

Appearance
The tunnel is 3x3 blocks wide. The walls and floor were left undecorated until around 2019 or 2020 when Sonic_Boom0 remodeled the first segment of the tunnel. The remainder of the tunnel was left untouched and is still undecorated.