The Pyrenees were formed millions of years ago when two huge sections of Earth's crust slowly pushed into each other, wrinkling the land upwards. The highest point inside Andorra is a peak called Coma Pedrosa, which stands 2,942 metres tall. On clear days you can see Spain and France from the top.
Because the mountains completely surround the country, they shape everything about daily life. The roads twist and turn through narrow valleys, villages are nestled onto hillsides, and every morning children can look out of their school windows and see towering grey and white peaks. In winter the upper slopes are buried under several metres of snow.
The mountains also create lots of different weather in a small space. One valley might be sunny and warm while a valley on the other side of a ridge is cold and cloudy. This happens because the peaks block clouds, so one slope catches rain while the other stays dry. Geographers call this a 'rain shadow'.