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.
hugequiz Premium members will see country/state max elevations when the quiz is over.
Quiz Takers 
a quiz with all urban areas in the us (regardless of population) would also be fun!
Per the census definitions, here are three metro/urban areas type quizzes:
https://hugequiz.com/quizzes/us-metropolitan-statistical-areas/
https://hugequiz.com/quizzes/us-micropolitan-statistical-areas/
https://hugequiz.com/quizzes/us-combined-statistical-areas/
It would be neat if we could select a specific amount of metro areas like you can with cities with the two hashtags. Like in the US Largest Cities, if you want 347 cities, you’d type #347#. I’d love it if we could do that here.
I had no idea that Concord (and basically the rest of Contra Costa County) was considered its own urban area. I always assumed we were part of the SF-Oakland UA.