international borders
Lines between nations
International borders are the boundaries separating sovereign nations, established by treaties, wars, or geographic features.
They determine where one country's legal authority ends and another's begins.
Crossing an international border typically requires documentation—passports, visas—and subjects travelers to customs and immigration controls.
Some borders are heavily fortified; others exist mainly on maps: The river forms the international border between the two countries.
- demarcationFormal boundary setting
- passportGovernment-issued travel credential
- visa stampImmigration approval in passport
- customsTraditional practices or import taxes
- wallVertical enclosing structure
sovereignty · demilitarized · territorial disputes · contested territory · treaties · smuggling · undocumented migrants · jurisdiction · checkpoints · diaspora · migration · Iron Curtain · guard · Berlin Wall · tariffs · Schengen · fence · razor wire
- bordersboundary, national borders, boundary line, boundary lines, boundary markers
- territoryterritory, land, region, domain, realm
international bordersstate lines
Boundaries between provinces
provincial borders · county lines · regional boundaries · city limits · district lines