The famous 17th hole of the TPC at Sawgrass Stadium Course. The game of golf is played in an area of land designated as a golf course. A course consists of a series of holes, which consist of a teeing area, fairways, rough and other hazards, and the green with the pin and cup. Because a round of golf consists of playing 18 holes, most golf courses have this number of holes. Some however only have 9 and the course is played twice per round, while others have 27 or 36 and choose two groups of nine holes at a time for novelty and maintenance reasons. Many older golf courses, often coastal, are golf links, of a different style to others.