In the German state North Rhine-Westphalia (NRW) we have a nice series of caches called "NRW 53 Challenge". One cache in each of the 53 counties/county-level cities in NRW plus bonus cache are planned. There are 20 in the moment.
They have different owners, most of them are mysteries. Since they are called "NRW 53 Challenge #Kreis xxxx" (xxxx for the name of each county/city, e.g. "Bonn") they of course all come up in the challenge map on PGC.
What I personally do not like is the idea to create challenge checkers for most of them, which was done by user "c0re" who tagged the script "Not really a challenge (by SeekerSupreme)" to
GC3QVJ3 - NRW 53 Challenge #Bielefeld
GC3WNJW - NRW 53 Challenge #Rheinisch-Bergischer Kreis
GC3WQ22 - NRW 53 Challenge #Kreis Siegen-Wittgenstein
GC3X7VB - NRW 53 Challenge #Kreis Gütersloh
GC3XMYB - NRW 53 Challenge #ESSEN
GC3YAW5 - NRW 53 Challenge #Kreis-Olpe
GC40AYK - NRW 53 Challenge #Kreis Düren
GC36WQQ - NRW 53 Challenge #Bonn
GC3WMYG - NRW 53 Challenge #Leverkusen
GC3WMZW - NRW 53 Challenge #Köln
GC3WPJ4 - NRW 53 Challenge #Mülheim an der Ruhr
GC3X0GW - NRW 53 Challenge #Kreis Mettmann
GC3X188 - NRW 53 Challenge #Düsseldorf
Since these caches are puzzles rather than real challenges I would prefer to drop the tags to these caches.
Ulf