At first I was surprised to see numerous petrol/gas station built in rocks on both sides of main highway on the top of the Port D'Envalira pass. Well, that time in 1994 the gas/petrol was about 25-30% cheaper in Andorra than in France and Spain. With my very low budget it was great news and surely I followed French drivers and fed my car with that "cheap" petrol.
Unfortunatelly it does not work that way today. Gas/petrol is at the same price or it's maybe up to 5-10% cheaper in Andorra than in France or Spain (look here).
Along my route N20 and N22 from France to the highest pass in the Pyrenees located in Andorra (see my off the beaten path tip) I saw numerous poles put along the highway to mark the road edges while covered by snow. These poles where the tallest I ever saw, probably about 4 m tall at the pass. In May snow was removed from the road and luckily that day I drove there there was no fog but beautiful sunny weather.
The very scenic mountainous road from France to Andorra is well maintained and open all year round. Rarely it's closed due to heavy snowfall. That time you have to drive through the toll tunnel in France, first to Spain and reach Andorra from the South.
Most folks think that the highest paved road in Europe is located in the Alps. In real it's in Spain, not in the Pyrenees though. It's in the Sierra Nevada Mountains in the southern Spanish province of Andalousia: Pico Veleta (3,398 m; 11,150 ft).
When I passed the entry point from France and passed through the highest pass in the Pyreneen Mountains (see my off the beaten path tip) I drove down to the first community in Andorra called Pas de la Casa which was full of numerous concrete hotels and tax free shops and didn't look especially great at first sight.
Fondest memory: However, the Pic Blanc (2705 m; 8875 ft) mountain covered by numerous ski lifts looked great. Pas de la Casa has the biggest ski area and highest lift-served terrain in Andorra. Now, it's linked with Soldeu, 14 km away by road. I was surprised to see so much snow in May. Futher down I amazed bright green steep mountains and narrow valleys covered by green meadows