Top 10 borders facts

Poland. Back in 1980, Poland had land borders with Soviet Union, Czechoslovakia and German Democratic Republic. Today it is neighboring Germany, Czech Republic, Slovakia, Ukraine, Belarus, Lithuania and Russia.

1. Northern Ireland is the only part of the UK that shares a land border with another sovereign state - the Republic of Ireland.

5. Spain borders France, Portugal, Andorra, Morocco (Ceuta) and UK (Giblartar)

Between the USA and Mexico. The fence on the US-Mexican border can be adjusted to remain on top of the ever shifting sand dunes. It is a special construction of narrow, 15 feet tall elements, that are movable vertically.

China and Pakistan. K2 is the second highest mountain in the world, after Mount Everest,It is on the border between China and Pakistan. K2 is known as the Savage Mountain due to the extreme difficulty of ascent. It has the second-highest fatality rate among the eight thousanders. With around 300 successful summits and 77 fatalities, about one person dies on the mountain for every four who summit.

Venezuela, Brazil and Guyana. Mount Roraima is the highest of the Pakaraima chain of tepui plateaus in South America. It serves as the triple border point of Venezuela, Guyana and Brazil. It's one of the oldest geological formations on Earth, dating back around 2 billion years. The flat summit of Mt Roraima is home to many species found nowhere else on Earth.

Germany has 9 neighbors (France, Luxembourg, Belgium, Netherlands, Denmark, Poland, Czech Republic, Austria, Switzerland). Other countries with numerous neighbors are Serbia (8), France (8), Hungary (7) and Poland (7).

China's combined land border measures 22,117 km (13,743 mi) from the mouth of the Yalu River to the Gulf of Tonkin. China borders 14 nations, more than any other country except Russia, which also borders 14.

7. Germany, Czech Republic, Slovakia, Ukraine, Belarus, Lithuania and Russia.

Hawaii is the 50th and most recent state to have joined the United States of America, having received statehood on August 21, 1959. In March 1959, Congress passed the Hawaii Admission Act, which U.S. President Dwight D. Eisenhower signed into law. On June 27, 1959, a referendum asked residents of Hawaii to vote on the statehood bill; 94.3% voted in favor of statehood and only 5.7% opposed it.