I'm not sure if that would be considered well travelled from a European perspective. For example if you live in the Netherlands, you could drive to Germany, Belgium, Luxembourg and France all within 3-5 hours. A quick Google says the average European visits 8 countries within their lifetime. Geographical proximity and culturally dissimilarity definitely need to be considered.
Also exposure to the country. Just driving through it (or sitting in an all-exclusive resort for that matter) is not what I consider travelling/exploring.