In primary schools, we have always been taught that golf is and outdoor sport activity. But its time we change the curriculum as Golfing is no more restricted to outdoors only. With all these golf simulators in the market, this luxurious sport can be enjoyed in the confines of your mansion too. For $55,000, you can put a shot on any of the world renowned courses, including Pebble Beach, Cog Hill, Oakland Hills and the Old Course at St. Andrews as it comes pre-loaded with 50 of them. Using a Windows-based PC and video projector that provide a life-sized view, the highlight of this simulator is two curtains of infrared beams that sit just in front of the screen. These emit 60,000 pulses per second, and as the golf ball passes through them the software on the PC is able to immediately calculate its trajectory, which is then translated to your virtual ball in the game. Just make sure that your den is big enough to accommodate this pricey golfing toy as it needs a room that is least 13 feet wide, 20 feet long, and 10.5 feet high.