Polo
The outdoor polo field is 300 yards long and 160 yards wide, the largest field in organized sport.
The average 18-hole golf facility takes up 150-200 acres, teeing areas using 2%, putting greens 2%, fairways 23%, rough/woods/water 70%, buildings and grounds 3%.
An acre is equal to 43,560 square feet and a polo field is 432,000 square feet, making the average golf course larger.
