http://www.archeage.com/enEvery object in the world can be interacted with, its not just for decoration usually
. You can climb a tree, you can get fruits from it, or you can cut it down and use it as a bridge over a river. You can also plant the trees almost anywhere you want, and they will grow overtime. For example you can plant a forest with your friends, and some person that runs by will get a feeling that he is lost, because there was no forest here before.