Game Description:Flight Simulator lets you travel to places that many of us only dream about. What better way to visit the USA? From the craggy heights of the Rockies to the plush, green Appalachians and from the majestic Pacific Northwest to the rugged Southwest. And by simply adding USA Extreme Landscapes you'll instantly transform these places into even more magnificent views. Using Flight Simulator's adaptable elevated mesh terrain technology, USA Extreme Landscapes boosts the detail 15-fold of elevation data (refined to 38- and 78-meter accuracy versus the usual 600-meter detail) for much more realistic US coastlines, mountains, and plains. The add-on covers the Appalachians, the Great Plains, the American Southeast, the Rockies, and the West Coast, with a Bonus CD enhancing Alaska and Hawaii.