You begin with two Europe countries/US states shown in the grid. Upon starting, your job is to sort the countries/states in order from largest to smallest by max elevation (so countries/states with the highest max elevation first). The order is represented by the '1st' thru '16th' in each box. You can click on a country/state to move it to a higher position in the list - simply click once and it will turn red, then clicked another higher-ranked country/state to position the first country/state before it. Click submit to check your answers...if they are in order you will get a new country/state added to the end which needs to be positioned correctly, and so on until you either get one wrong or complete all 15 levels.
PLEASE NOTE: Only the portions of each country geographically in Europe are counted to determine the highest points. So no Asian portion of Turkey/Russia, African portion of Spain/Portugal, Greenland, etc.
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Quiz Takers 
Helgoland, Koserow and Selfkant aren‘t cities, why are they included on this quiz? Or does it count all municipalities, regardless of their official classification?
they actually are counted as settlements/communes by the German census
It´s usually spelled Heligoland, not Helgoland tho
i’ll change to accept both.
That’s the English spelling, in German it’s Helgoland
On int difficulty, in the square in the northeast around szczecin/stettin, the largest german city is definitely schwedt/oder (33.524 inh.), but it doesn’t accept this nor any other significant town in the region as solution
Found the problem: some towns with “/” in their name are only accepted without it, so “schwedtoder” instead of “schwedt/oder”