Disused Tunnels Database Map
<250 yards long 250-500 yards long 500-1,000
yards long
1,000-2,500 yards long >2,500 yards long
Each tunnel is marked at the midpoint of a straight line drawn between its two portals. As a result of curvature, this can result in the marker being off the tunnel line. Where only one portal remains, the marker is placed at that portal. No buried tunnels are shown.

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