Look Inside the Abandoned Halls of Fairfield Hills Psychiatric Hospital in Newtown, Connecticut
Since it's frowned upon (ahem, illegal) to go inside the buildings without permission, there are not that many photos/videos from inside the walls, which is why I was surprised to see these appear on Youtube just last week (12/23/20).
A user by the name of @mR. cHoW posted the video and refers to himself as Mike in it. The images above are stills from the video he captured. Mr. Chow does goes for a drive and gets gas for the first 17 minutes and change so skip ahead to the 18:00 mark to see inside. At the 25:00 mark, he encounters a flood in the stairwell.