I&#x27;ve always liked this one: <a href="http:&#x2F;&#x2F;aqicn.org&#x2F;map&#x2F;europe&#x2F;" rel="nofollow">http:&#x2F;&#x2F;aqicn.org&#x2F;map&#x2F;europe&#x2F;</a>
It&#x27;s available for all continents.