Actual Underground Passages?

It often seems like every castle or manor house has stories of secret tunnels attached, usually for easy escape or smuggler access. And as romantic a notion as the secret passage is, they are almost always just that, stories. I’m mentioning this report from the Tyrone Times because it has an eyewitness account from someone who once played in the tunnels. Now, eyewitness evidence can also be wrong, so I’m not exactly convinced, but there’s a chance.