TWG comes with no less than SIX complete PGA 18-hole courses. However, only one is included with the download. The rest you have to spend more bandwidth to download separately. Pebble Beach, Pinehurst, Bay Hill... And you can even download PGA players to play as or along with.
The graphics are full 3D. Thus, it can give you a "ball cam" where the camera follows the golf ball's trajectory all the way to where it lands. There are real contours in the landscape. Bunkers and sand traps actually LOOK lower than the rest of the terrain.