Edge of the fairway.
A golf course comprises a series of holes, each consisting of a teeing ground, a fairway, the rough and other hazards, and a green with a flagstick ("pin") and hole ("cup"), all designed for the game of golf. A standard round of golf consists of playing eighteen holes, and most golf courses therefore have this number of holes. Some, however, only have nine holes, and the course is played twice per round. Original public domain image from Flickr