I work in forestry and i spend a lot of time in the forest. Four days a week the nature around me and i can feel it...Sometime.
When i walk cross the forest, i can feel a deep energy from there, quiet but real. it's like a peaceful sensation which tell me: take your time...sent the harmony between air and ground. the trees look like a element between two world, a element in harmony between them. when i'm in the forest, it's like if trees doesn't want to talk me. It seems to ignore me. I think it's possible to sent the energy which come from a tree. In général, i think it's possible to sent the energy of all life.
So, if all of that is a hallucination, it not my problem...it's a good exercise to be cool and relax.