Create a road that was made on the sides of a huxe rockey mountain clif

Create a road that was made on the sides of a huxe rockey mountain clif. And also beneath the cliff a huge brown river is flowing. Few plants are growing on the road. There are natural caves near the road. Lush green forest beside the river. There are small typicle PNG highlands round houses on the sides. Dusty Trucks with their trailers overloaded with bulb onions drove down the road. Black typicle Highlands men setting on the bulb onions as the car drove. Make it more realastic