The phrase "hilly landscape" refers to an area of land that has many small hills or slopes. It means the land is not flat but instead has elevation changes. Full definition
The Cinque Terre, or «Five Lands», are 5 picturesque villages built on the rugged and hilly landscape of the Liguria coastline and one of Italy «s most popular sites, attracting many visitors every year. (breathewithus.com)
You can imagine such surfaces as being like hilly landscapes. (sciencedaily.com)
Rocky mountains, vast forests, soft hilly landscapes and magnificent sandy beaches all go into characterising the Abruzzo region of central Italy. (pfitravel.com)