Rolling hills are gentle, rounded elevations of land that rise and fall smoothly across a landscape. They are often characterized by their soft contours and can be found in various regions around the world. These hills are typically formed through natural processes such as erosion and sediment deposition, creating a picturesque and serene environment. The vegetation on rolling hills can vary widely, ranging from grasslands to forests, depending on the climate and soil conditions. They are commonly seen in areas like the English countryside or the Midwestern United States, where they contribute to the scenic beauty and agricultural productivity of the land.