World War I involved 32 nations from 1914 to 1919. It redrew the world map and reshaped many borders in Europe. The collapse of the Russian Empire created Poland, the Baltics, and Finland.

This is Europe's only truly integrated bi-national city, where the border is virtually invisible in daily life. If you enjoyed this guide, follow us for more. Did you know that France purchased a ...

In reality, however, these two countries, which belong to separate continents, actually share a land border. Looking closer at a map of the world, you will soon notice that Spain has two small ...