The coords listed above are for the starting point of your adventure.
Enter the tunnel and walk the short distance to the first tunnel junction.
Now take the upper tunnel and crawl around the corner.
Do you see the forever tunnel that leads to eternal darkness? Yep, good, you need to crawl or duckwalk the 47 sections of tunnel to the next junction. (this is the junction a hint you will find later refers to).
OK, the hard part is over..... (except you have to leave this way). Take the bigger tunnel to your right, follow it until you see daylight.
Look for the mint tin under the PVC pipe for further directions.
Please place clues and containers back where you found them and make sure they are secure. Thanks!!!