I have a bad phobia of wide open spaces and flat horizons but don't want to depend on prescribed drugs to control this. Is there anything I can do to reduce this anxiety when in such open places?

Have a fear of wide open spaces and flat horizons, even when driving. Its a feeling like I’m going to be pulled into space and can get very intense. Am looking for advice on breathing or mental techniques I might employ when in such situations. I don’t want to have to depend on prescribed drugs or tranquilizers to reduce this anxiety. I’ve seen other blogs here that indicate there are others that share this phobia. Glad to know I’m not the only one.