One of my characters in the novel lives in a house surrounded by a wildflower garden. This site made picking the flowers for the garden easy. Lovely flowers, and to me, exotic. Over here in Perth, my wildflowers are things like kangaroo paws, eggs and bacon orchids and sundews.
Pictures on the web are a fantastic resource when trying to visualise foreign settings. Real estate sites are useful for getting a sense of the suburbs in a city. Travel guides usually skip lightly over such details :)