Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.
Interesting fact: A very small percentage of Northern Virginians live in incorporated cities or towns. Only 14.59% of people living in these counties live in incorporated cities or towns.
Good quiz. FYI, the pinned comment isn't exactly accurate, as people living in independent cities (Alexandria, Fairfax City, Manassas, Falls Church, and Manassas Park) don't live in any county.