Exclusively in California since the days of "Flight Unlimited II"; from Santa Rosa in Sonoma county, down the Pacific Seaboard, via San Francisco and Silicon Valley, to Los Angeles in the south.
Amazing, highly realistic scenery when compared to my various Maps of the area covered.
I have spent many years populating all the various airports and airfields in California with my own busy scenery objects aided by LAGO FSE and Abacus EZ-Scenery design programs...and Runway 3...

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Paul... 8-)...!
Strangely enough, although I live in England, Uncle Bill totally abandoned us when designing the scenery for Great Britain in his various Flight Sims...

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He has been heard to say; "Where is Great Britain?"....
..apparently...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.