Canyon is a deep valley with steep sides, often cut into rock. It is usually formed by a river that slowly wears away the land. Canyons can be very deep and wide, with layers of rock visible along the sides. Some canyons stretch for many kilometers.

Canyons are found in regions around the world, such as the Grand Canyon in North America and river canyons in Asia. They formed over long periods of time. Canyons contain different plants and animals adapted to their environment. Some also have trails, viewpoints, or nearby settlements.