Andorra is not just the shops ( or the long ribbon of petrol stations from Spain to France ).

Off the main road it is lovely, and the driving very pleasant, with mountain views.

http://visitandorra.com/en/andorra-s...orra-la-vella/

The Spanish ( Catalan ) village of Le Seu d'Urgell has a very nice medieval center and a few museums and interests. Its just near the boarder.

Windy roads, with speeding Andorran registered cars will keep you amused on your trip. Take the toll road from Barcelona.