in the last shot on the first page (#6) you see the fixed roads / mtns.
AND THATS HOW YOU ACQUIRE A CITY VIA CULTURE (5)
dont want to spam any further, so i'll just be editing this post now, i just got too excited there.
you need more than 1 of a luxury to trade it
tech tree with real pics. hah
i dont like that diplomacy / foriegn advior screen :-/