Off-roading is the activity of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, and other natural terrain. It ranges in intensity from leisure drives with unmodified vehicles to competitions with customized vehicles and professional drivers. To engage in off-roading, vehicles capable of off-road driving are required, such as ATVs, which have features designed specifically for use in off-road conditions such as extended ground clearance, off-road tires, and a strengthened drivetrain. Some manufacturers offer vehicles specifically designed for off-road use. There are different types of off-roading, including dune bashing, rock crawling, and overlanding. Dune bashing is a form of off-roading on sand dunes, where a large sport-utility vehicle is used. Overlanding is a type of off-roading that involves traveling long distances over rough terrain while camping and carrying supplies. Off-roading is a popular recreational activity that offers fun and adventure to people who enjoy driving in rough and unpaved terrain.