All of my most memorable tefillah / prayer experiences have been outside.
As luck would have it, a brown-out at Temple Israel this morning rendered the air conditioner useless, so we picked up the morning minyan and moved it out into the courtyard. Shaharit is really the best service to have outside, not only because the time for reciting it is determined by the rising of the sun, but also because there is nothing more beautiful than gathering as a community to begin the day under the bright morning sky, with birds chirping and a light summer breeze.
The opportunity to pray in a natural environment rather than a climate-controlled, enclosed space enables the resonances of Creation in tefillah. Try it!