Jwoww, who turned down Playboy's $400 grand, is

heading to Italy for Shore Four.

The entire "Jersey Shore" cast is finally getting THE BOOT -- because we're told the plan is to shoot Season 4 in Italy!, according to TMZ.com.

Sources connected to the show told TMZ.com that they will be scouting locations in Italy -- similar to the way they did it in Miami -- to find the right locale.

One source said they've already lined up some of Vinny's Italian relatives to host the "Jersey" crew for an authentic Guadagnino dinner. And we're told ... two months ago execs began working on getting visas for the cast and crew.

Of course, the whole thing is contingent on whether the Italian government lets them in the country!!

UPDATE: MTV just confirmed TMZ's story ... Italy's the place! Arrivederci!

More Jersey Shore
Snooki and Jwoww Pilot -- The Empire Grows
Angelina's Rap Song - Mocked By Vinny's Entire Fam!

And....click: