1. Canada
   Russia
2. Australia

Canada doesn't have a whole lot of other countries sharing its borders, but it does have an impressive coastline. At 125,000 miles, it's the longest coastline of any nation and is bordered by the Pacific, Arctic and Atlantic oceans.

1. Paraguay
   Afghanistan
2. Kazakhstan

At a million square miles, Kazakhstan is the ninth largest country in the world. This nation, which straddles both Europe and Asia, also happens to be the world's largest landlocked nation.

1. Brazil
   China
2. Japan

China borders 16 countries, more than any other nation on Earth. Russia ranks second, with 14 countries sharing its borders.

1. Equator
   Tropic of Cancer
2. International Date Line

The Diomede Islands lie in the Bering Strait, with each of the two islands located on either side of the International Date Line. The larger of the two islands is part of Russia, while the smaller of the two is part of the United States.

1. North Korea
   Nepal
2. India

The border between Nepal and China lies somewhere along the rocky heights of Mount Everest. This remote border also happens to be the highest international border in the world.

1. North and South Korea
   U.S. and Mexico
2. Spain and Portugal

The 2.5 mile demilitarization zone between North and South Korea is considered the most heavily guarded border on Earth. It's also not an actual border, because the countries have technically still been at war since a cease-fire was agreed upon in the '50s.

1. U.S. and Canada
   Argentina and Chile
2. China and Pakistan

The longest land border between any two countries can be found between the U.S. and Canada. It includes the border between the mainland U.S. and Canada, as well as between Alaska and Canada, and totals more than 5,500 miles.

1. U.S. and Mexico
   Egypt and Sudan
2. Russia and Kazakhstan

While the border between the U.S. and Canada is the longest land border on the planet, it is broken up between the continental U.S. and Alaska. In terms of the longest continuous land border, the one between Russia and Kazakhstan comes out on top.

1. Egypt and Sudan
   India and Pakistan
2. China and North Korea

Neighboring countries Egypt and Sudan disagree where their borders lie. Both lay claim to an area known as the Hala'ib Triangle, while neither want to own a smaller area called Bir Tawil. As a result, Bir Tawil is the largest unclaimed piece of land on Earth outside Antarctica.

1. Germany
   Poland
2. France

In 1989, Poland was bordered by the USSR, East Germany and Czechoslovakia. None of these countries exist any longer, so Poland has all new neighbors -- though its own borders haven't actually changed at all.

1. Nigeria
   Zambia
2. South Africa

Botswana and Zambia share the world's shortest international border -- it's less than a tenth of a mile long. The borders of Namibia and Zimbabwe are also located very close to this short border crossing.

1. Belgium
   France
2. Switzerland

The city of Baarle straddles the border between the Netherlands and Belgium. The two countries did their best to mark the physical location of the border using painted lines and crosses on the ground -- though some of these lines pass right through stores, restaurants and even homes.

1. Croatia
   Albania
2. Liechtenstein

When a country is totally land-locked because it is bordered by countries which themselves are land-locked, it is said to be double land-locked. Two countries on Earth share this feature -- Liechtenstein and Uzbekistan.

1. Japan
   North Korea
2. Mongolia

The earliest fortifications that make up the Great Wall date back to around 700 BC. The wall itself was designed to keep out invaders from the north, and today separates China from Mongolia.

1. nothing
   a wall
2. missing trees

The 5,500-mile border between the U.S. and Canada passes largely through wilderness. Despite this, it's easy to spot, because it's marked by a 20-foot wide clearing where all trees have been removed. This dead zone is known as "The Slash."

1. enclave
   territory
2. colony

An enclave is an independent nation located entirely within another country's borders. One example is Vatican City, which is located entirely within the country of Italy.

1. China
   India
2. Nepal

The border between India and Bangladesh is home to 80 percent of the world's enclaves. There was even an ultra-rare third-order enclave until the 21st century, in which a piece of India was located within a piece of Bangladesh, which was located inside a piece of India within Bangladesh. It was called Dahala Khagrabari if you want to investigate further how this worked.

1. 1
   2
2. 3

Mexico borders three other countries. The Rio Grande runs along the border between Mexico and the United States, and to its south, Mexico borders Guatemala and the northern tip of Belize.

1. Iran
   Afghanistan
2. Pakistan

The Wagah border crossing between India and Pakistan hosts an elaborate gate-locking ritual every evening. For 45 minutes, guards in fanned hats perform a high-kicking dance before locking the gate between the two countries for the night.

1. 2
   16
2. 98

Just 16 countries share a border with only one neighbor. This list includes some pretty large players, including Canada and Portugal.

1. 1
   2
2. 3

The U.S. shares a border with only two countries. To the north is Canada, and to the south, separated by the Rio Grande, is Mexico.

1. Germany
   France
2. Portugal

Spain borders three countries, including France, Portugal and Andorra. It's also separated from Morocco by the very narrow Strait of Gibraltar.

1. Afghanistan
   Paraguay
2. Vatican City

Vatican City is both the smallest land-locked country and the smallest country overall. It is located entirely within the borders of Italy.

1. 1
   2
2. 3

Despite its massive size, Canada shares a border with just one other country. Its shared border with the U.S. stretches more than 5,500 miles.

1. India-Pakistan
   U.S.-Mexico
2. China-North Korea

In 2015, NASA shared an image taken from the International Space Station. It showed the highly visible border between India and Pakistan glowing bright orange. The orange lights were put in place to help discourage smuggling between the two nations.

1. Germany
   Ukraine
2. Russia

The border between Poland and Ukraine has a pretty cool feature embedded into the landscape. Giant grassy fish serve as a symbols of unity between the two nations.

1. Japan
   Poland
2. North Korea

The Tumen River runs 324 miles, at one point serving as a natural border between China, Russia and North Korea. Though heavily polluted, it is a popular tourist spot, with restaurants and other attractions along its banks.

1. Germany
   France
2. Spain

Lake Constance in Europe has no borders, and is considered a common area by the surrounding countries. It serves as a natural border between Germany to the north, Switzerland to the south and Austria to the east.

1. France
   Italy
2. Portugal

Located in central Europe, Germany shares a border with nine countries. They include Denmark, the Netherlands, Belgium, Austria, the Czech Republic, Poland, Luxembourg, Switzerland and Liechtenstein.

1. Chile
   Brazil
2. Uruguay

Since 1904, people passing between one spot along the Argentina-Chile border have found themselves faced with a statue of Christ the Redeemer. Weighing 4 tons, it signifies peace between the two nations.