The most safe to fly your model is at the flying field of aeromodelling club.
Here is some links to the nearest aeromodelling club in your area:
- http://maps.rcgroups.com , Choose your country, state and use the filter to check only the flying fields category.
Make sure you have read the A.M.A safety code. It is wise that you know your model characteristics (the flight speed, the flight altitude, etc) before deciding to fly the model in any field, not in aeromodelling clubs flying field. A.M.A has made a documentation on Recommended RC Flying Site Specifications and you may have a look here.