Skellig Michael as Ahch-To Island
Rey tries to convince Luke Skywalker to return with her to the Resistance and to train her in the ways of the Force.
Source: Wikipedia
Star Wars: The Last Jedi Filming Locations
The resistances is on the run from the First Order after their destruction of the republic while Rey tries to convince Luke Skywalker to return to the fight.
See also: The Phantom Menace, Attack of the Clones, Revenge of the Sith, A New Hope, The Empire Strikes Back, Return of the Jedi, The Force Awakens, The Rise of Skywalker, Rogue One, & Solo.
Star Wars: The Last Jedi was filmed in Dubrovnik in Croatia as well as in Ireland & Bolivia.
Salar de Uyuni as Crait Flats
Dubrovnik North Wall as Canto Bight Wall
Someone reports Rose and Finn's illegally parked ship to the security team.
Source: Making Star Wars
Placa Ulica (between Nikole Božidarevića & Miha Pracata) as Canto Bight Street
Finn and Rose race down the street on the backs of the local creatures while being chased by local security.