"It used to be" - 5k years ago
"now it'll be swamped with tourists" - today now that its a famous dig site, people will come to look.
All of it parodying a common refrain from locals when ever a cool local spot gets media attention on the news or some national TV show.
Much like dissecting a frog, explaining humor kills the joke.
To OP: I liked the joke.
People make jokes sometimes on here, its not all serious business, I don't think it would have been different years ago. You should get down voted for being a bit rude and simultaneously hypocritical because your criticism is also based on also missing something fairly obvious. The OP didn't deserve that comment, and the commenter should be corrected and have it pointed out they're actually the one making the embarrassing mistake.