<h2>Hitting the ball out of bounds</h2> The borders of a course are marked as such, and beyond them is out of bounds, that is, ground from which a ball must not be played. If a golfer hits the ball out of the course, into the "out of bounds", the player must hit a ball from nearly the same position as the original ball was played, with a penalty of one stroke.
Other Areas
Some areas on the course may be designated as ground under repair, or "G.U.R.". This is a part of the course where repairs are being made by greenkeepers, or there is damage to the course. A ball coming to rest in this spot may be lifted and then played from outside such ground without penalty. Certain man-made objects on the course are defined as obstructions (i.e. Distance posts, gardens etc.), and specific rules determine how a golfer may proceed when the play is impeded by these.
I sometimes hit my ball out of bounds. I play the ball inbounds for practice though, if it can be played. I take a penalty stroke all the time when I have no choice.