The MPCC thread began to touch on Top 10 Practice Facilities, so I figured we might as well start a new thread.
Courses that I've played that would make my Top 10 list:
Muirfield Village - 360 degree range, changed the way practice facilities were thought of.
Whisper Rock - Double sided range, 2 chipping/sand practice greens, 2 practice putting greens, each with the same grass, speed and firmness of the corresponding Upper or Lower course.
Metedeconk National - Probably my favorite. Huge practice facility (50 acres!) with target greens that are better than the greens on most courses. Seperate short game practice facility. Teaching facility. Main practice tee and member-only practice tee. Seperate practice putting green next to 1st tee.
Kinloch - L93 bentgrass practice tee with 7 target greens. 2 chipping/pitching practice greens, 2 practice putting greens, short game practice facility, covered/heated practice bays for cool weather.
Piping Rock - the sheer scale and grandeur of the practice field is breathtaking. Absolutely enormous and perfectly in keeping with the scale of the property.