Either way, now that I knew the purpose of those ground rails, I can’t help but note how the sky ship was following their general path. The obvious inference is that they must lead to major towns and cities, no doubt servicing their equivalent of ports. The plains and grasslands slowly turn to a yellowish green as the sky ship approaches a very large gorge with a similarly large river flowing rapidly through it. A single large bridge crossed it’s length, carrying the ground rails in it’s centre and the hoof paths along the sides, each different path on the bridge separated by guard rails.