Mountain or Hill behind a House
The classic Feng Shui location for a home is to have it nestled halfway up a hill (to provide support) with a wide view or open area in front (to facilitate beneficial chi energy that would flow towards your home and family). A water view in front would be the most ideal.
The mountain or a hill (that is naturally lush rather than barren or rocky) behind your property attracts a beneficial Chi to your home and garden by creating the auspicious horseshoe shape. Its proximity should not be looming however, which would alter its beneficial support to that of threat or dominance.