Unusual geography in The Atlas of Unusual Borders and The Atlas of Microstates books

Boundaries are not usually viewed as either "ordinary" or "unusual", but some are definitely less common than others.Not that many people would expect countries to have territory inside the territory of another, or know that national borders can run through cities, sometimes dividing a city library or even a honeymoon-suite bed in half!Sometimes, two cities from different sides of a national border join together and celebrate New Year twice, one hour apart, in the shared town square, and the 350-year-old tradition of the change of boundary between two large Western European countries twice a year is an occurrence that would probably surprise almost everyone.