Zac, RK, Hank,
Welcome back Zac.
Coincidentally, I was at the Louvre on the same day as you. Visiting Paris was just as agonizing as visiting London.
Moving on, I’m actually chiming in about the Chunnel. That part of the journey of London to and from Paris took 20 minutes. It was not loud. It is beneath the water but of course the tunnel is just in total darkness so there is no sense of being underwater whatsoever.
I hate myself for commenting off topic again. I need to stick to what matters,