Russia has the longest land border in the world, stretching over 20,000 kilometers.

The 49th Parallel is the boundary between the United States and Canada, stretching from the Atlantic Ocean to the Pacific Ocean.

Russia has the most land borders, sharing borders with 14 countries.

The Demilitarized Zone is the boundary between North Korea and South Korea, a 4-kilometer wide strip of land that was created after the Korean War.

Canada has the longest coastline in the world, stretching over 243,042 kilometers.

The Rio Grande is the boundary between the United States and Mexico, stretching from the Gulf of Mexico to the Pacific Ocean.

Russia has the largest land area, covering over 17 million square kilometers.

The Indus River is the boundary between India and Pakistan, stretching from the Himalayas to the Arabian Sea.

Vatican City is the smallest country in the world, covering an area of just 0.44 square kilometers.

The Rhine River is the boundary between France and Germany, stretching from the Swiss Alps to the North Sea.

Indonesia has the most islands, with over 17,000 islands.

The Douro River is the boundary between Spain and Portugal, stretching from the Spanish-Portuguese border to the Atlantic Ocean.

The Nile River is the longest river in the world, stretching over 6,650 kilometers.

The Alps are the boundary between Italy and Switzerland, stretching from the Mediterranean Sea to the Adriatic Sea.

China has the largest population, with over 1.4 billion people.