I am totally confused about what I need to do to start trading with other civs in my game .
Since there are no more caravans, do I just need to connect a road to a city of the other civilization and then trading automagically starts up between my civilization and theirs or ???
Also, unrelated question. I set up several colonies to exploit mineral resources. When first founded, it created a graphic image over the resource - some kind of hut like thing. I noticed that later the graphic disappeared . Does that have any significance.
Thanks in advance
Since there are no more caravans, do I just need to connect a road to a city of the other civilization and then trading automagically starts up between my civilization and theirs or ???

Also, unrelated question. I set up several colonies to exploit mineral resources. When first founded, it created a graphic image over the resource - some kind of hut like thing. I noticed that later the graphic disappeared . Does that have any significance.
Thanks in advance