Around 25,000 have already arrived in Hopkinsville, many putting up tents in campgrounds, ready for the big moment. They've all come to witness the total solar eclipse.
"We planned this last year. We booked about four months ago," said Joshua Lewis, visiting from Louisville. "I went to Mexico in 1991 and saw the seven-minute eclipse with my family, so I wanted to do this with my family."
If you're in the Hopkinsville area during the eclipse Monday, emergency managers said you probably won't be able to tweet, use Facebook, or Instagram from your phone during or right after the eclipse, with the cellular data jammed.
For all you need to know about the eclipse, click here.