Illinois man finds mysterious tunnel beneath his home

It connects to Gaza (it is May 2024 when I am watching this). I would be concerned about it caving in, but if a house was built over it, and there are no signs of problems, arches are strong, I would want to know just how far back it goes..... and I would be figuring out a way to make it so I could get in, still have sidewalk fixed, and not tell authorities! It is super cool, but insurance could make it too expensive to live in the home, and if he has to fill it in, that would be terrible too!