Country #55 Andorra! I had not seen any internet account of the borders around Pas de Casa and on my visit focused on the Passport and Customs controls on the RN22 outside the town entirely in France. 2 other areas of interest are the Envalira Tunnel where a treaty on 2001 involved a land swap to enable Andorra to build the access roads and where the RN22 enters the town. Both roads are marked precisely where the border crosses them. Maps, photos and full report here