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Mum finds 50-metre long tunnel at the bottom of her garden
(www.kentlive.news)
Local Kent Communities:
Logo By Richard Thompson - Transferred from en.wikipedia to Commons., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2148137
...and one easy solution: a third tunnel.
And the soil from the third?
Believe it or not: fourth tunnel.
Whoa! Mind blown!