Mac Photos app shows wrong location
So this is odd. I have around 19,000 photos in Photos and suddenly 320 of them (scattered throughout the entire collection) are showing that they were photographed in Wise River, Montana. If I had ever been in Montana, it might be easy to understand how such a thing could happen. If they were all in a grouping of some type it mighty also be easier to explain, but they aren't. This is a totally random collection of photos spanning about 10 years.
Is there something special about this location? What would randomly change these photos?
MacBook Pro (Retina, 13-inch,Early 2015), macOS Sierra (10.12.2), 16GB Ram & 1 TB Flash