X-Plane 10 Scenery--Three Hills Airport (EH3). Three Hills Airport is a small General Aviation field located in the quiet prairie town of Three Hills, Alberta, Canada. The airport is home to the Prairie School of Mission Aviation, a secondary school to the Prairie Bible Institute. I think this airport looks best with runways follow terrain contours turned OFF, otherwise you'll find some floating hangar edges and a rather treacherous dip in the taxiway down near runway 29. By Shawn Weigelt.