1. Haiti and the Dominican Republic
2. Norway and Sweden
A snowmobiler prepares to ride the snow-covered border of Norway and Sweden.
3. Brazil and Argentina
4. Brazil and Bolivia
A river-divided border shows the difference in deforestation practices in the rain forest between Brazil (light brown) and Bolivia (dark green.)
5. Slovakia and Poland
6. United States and Mexico
7. United Kingdom and Spain
8. India and Pakistan
The Wagah border ceremony takes place every night before the flags are lowered at the only road between the two countries.
9. Afghanistan and Pakistan
10. United States and Canada
The USA and Canada line is the longest international border in the world, stretching approximately 5,500 miles.
11. Argentina and Chile
12. Panama and Costa Rica
The single-lane bridge over the Sixaola River, a natural border between the two Central American countries, is used by cars, trucks, and pedestrians.
13. Egypt and Israel
14. Argentina, Paraguay, and Brazil
The "Triple Frontier" is one of many tri-points around the world that connects three neighboring countries.
15. Poland and Ukraine
16. Nepal and China
The summit of Mt. Everest marks the border between the small, sovereign state of Nepal and China.
17. Austria, Hungary, and Slovakia
The three countries come together in a small park, dedicated to the tri-point, with a picnic table marking the borders.
18. Spain and Morocco
19. Netherlands and Belgium
The town of Baarle offers a unique experience as it sits right on the border of the neighboring countries.
20. Italy and Switzerland
The Margherita Hut, on top of the Alps, sits on the border of Italy and Switzerland. It can only be accessed by foot and is used for a research center.
21. Vatican City and Italy
22. North Korea and South Korea
The Joint Security Area (shown above), within the Korean Demilitarized Zone, holds negotiations between the two countries.
Bonus: Northern and Southern Hemisphere
"Middle of the Road" park in Ecuador is supposed to mark the point of zero degrees latitude, although there is some discrepancy to the claim.