Great story. That's how old Riv Van Winkle must have felt :)
Your story has the eerie feeling of some of my nightmares. i wonder if you got the idea form any of yours.
I usually dream that get to a rather familiar place that all of a sudden becomes unrecognizable, or I just can't find my way back or out, even though in the dream it is kind of obvious.
Your character obviously survived to tell the tale. I wonder if there is more to fill in the gap
I am not sure if there will be a part two or not. I could take it in a few different directions, just not sure which if any to choose. I can see it taking a Dante's Virgil type of twist, or an alien abduction type twist, or...well so many different directions, the hazard of just picking the keyboard up and going with a picture, every viewer has a different view of the picture, of parts they like, of parts they don't and of parts that sing to them. It was a fun write for me though.