Side effects include total bliss and a happier mind.
Your sacred space will be used for meditation, prayer, sending healing energies and writing in your journal. This space is for your introspective process, and it is important that it is undisturbed by outside influences.
I have to admit I am not a nature meditator, unless it's at a beach and the lull of the waves transports me. Generally outside, I find I end up focusing more on the bugs or ground beneath me.