TheMulattoMaker
Dictator of RF
Is it related to "countries that have other countries inside of them"?
...or... attached to them?
...or... attached to them?
As always, not even close.
Hint #2: Red countries have 5 of these, orange have 3, yellow have 2, green have 1, grey have 0.
10. The Vatican Observatory owns a telescope in Arizona.
As Rome expanded, light pollution from the city made it increasingly difficult for astronomers at the Vatican Observatory—located 15 miles from the city at the papal summer residence in Castel Gandolfo—to view the night skies, so in 1981 the observatory opened a second research center in Tucson, Arizona. The Vatican conducts astronomical research with a state-of-the-art telescope that sits atop Mount Graham in southeast Arizona.
I'm not going to let you give up.
Hint #4: It's related to cities. Red countries have 5 such cities, orange ones have 3, yellow 2 and green 1. You have only to guess what cities I'm talking about.