A mud room and vegetable washing station! (And the view...envious!!) Looks like your neighbor has a high tunnel.
(Now, off to garden!)
Actually, that is a huge, covered cattle ‘finishing barn’. Inside are multiple pens. I haven’t talked to them yet, but I suspect they bring cattle in off pasture, feed them up with grain, then ship them off to “the spa”. We call it the ‘cow palace’. They keep the place very clean/orderly so we hope it’s not an issue when the weather warms up - the way the wind blows, it won’t be blowing from the palace towards our place. I am optimistically considering it a potential source of cow compost. One other thing I noticed - the deer come by & clean up hay & grain scraps. Occasionally we hear ‘moos’ around dinner time, but after having grandparents (both sets) who had farms & cows (one had a dairy), cow sounds are like being back at the grandparents’ farms.