A tripoint, trijunction, triple point or tri-border area is a geographical point at which the borders of three countries or subnational entities meet.
There are approximately 176 international tripoints. Nearly half are situated in rivers, lakes or seas. When on dry land, the exact tripoints are usually indicated by markers or pillars, and occasionally by larger monuments.
A quadripoint is a point on the Earth that touches the border of four distinct territories.
Where Three Countries Meet: World Famous Tripoints
The Tri-Border Between Argentina, Brazil and Paraguay
crossing-a-river-where-four-countries-meet
