Cliffs are steep, vertical, or nearly vertical rock faces that can be found along coastlines, mountains, and riverbanks. They are formed through processes like erosion, weathering, and tectonic activity, which shape the landscape over time. Cliffs can vary in height and composition, often made of limestone, granite, or sandstone. Cliffs provide important habitats for various wildlife, including birds that nest on ledges and plants that grow in crevices. They also offer stunning views and recreational opportunities, attracting hikers and climbers. Some famous cliffs include the White Cliffs of Dover and El Capitan in Yosemite National Park.