A 'most beautiful riverbank landscape' refers to a scenic area along a river that is particularly picturesque and aesthetically pleasing. These landscapes often feature lush greenery, natural rock formations, and the gentle flow of water, creating a serene and visually stunning environment. They can be found in various parts of the world, such as the River Thames in London, the Li River in China, or the Danube River in Europe. Such areas are often protected and preserved due to their natural beauty and ecological importance.