The ability to enter another country as a tourist without a visa (or with some electronic visa) is cool. Obviously problematic for a citizen of a country with f

The ability to enter another country as a tourist without a visa (or with some electronic visa) is cool. Obviously problematic for a citizen of a country with few such agreements. What I find far more interesting personally is the ability to reside or do business meaningfully in another country in virtue of the bilateral agreements between the two countries. Some examples of which I have read here or elsewhere. - US citizens can establish their own business in NL - US citizens can overstay Schengen limits in PL due to anterior bilateral agreements - reduced time to permanent residency in CH for CA or US citizens.