The Caravan allows you to send resources to any player on the World Map, as well as to Clan resource production structures. This building also determines the maximum carrying capacity of your caravans. You can build the Caravan once your Capitol has reached level 10.

Select any large tile in your City.

Scroll down to find the Caravan and confirm construction.

A 20% tax is levied on all caravans sent to other players.