well theres not only pot but other entheogens that will really connect you with nature or even other dimensions.
kinda like Terrence Mckenna said......
What we are doing with computers by making evrything smaller down to the nanotechnology level, nature has been doing for way longer with mankind. Nature will make chemicals with certain atomic arrangements that interface our brains in a certain way and change the "programming" so we can tune in to different things we normally couldnt see. Much like a computer needs certain input in the form of a program to make it perform specific functions.