I've written two books and am in the very early stages on my third book. One thing these books have in common is that they contain places I have never been or haven't visited during the time of year I'm writing about.
This creates a special set of issues for writers when writing fiction. Chances are that your book will be read by someone who lives in the town or country you've tried to describe. You must add enough detail, from street names to description of the architecture to the feel of the town for the effect to be authentic.
I am a big proponent of writing about what you don't know. After all we have fantasy writers and historical fiction writers who (usually) haven't been to the time or place they are writing about.
The single best tool that any writer can use to give detail and authentication to their setting is Google Earth. What's great about Google Earth is that you can type in a specific address and get a 360 degree view of the surrounding area.
For The Clouds Aren't White I picked out a house on the Isle of Skye so that I could describe the same view out the kitchen window. I've used it for Lives Paris Took to orient myself around Paris and figure out the distance from the Sorbonne to the main character's apartment.
I suggest downloading Google Earth and trying it out. Look up your house or hometown, figure out what is different. Then look somewhere you've never been and always wanted to visit. After you've puttered around for a while, write a description of it.
Hope this helps!