Spain Metropolitan Spain http://purl.obolibrary.org/obo/GAZ_00003936 That part of the Kingdom of Spain that occupies the Iberian Peninsula plus the Balaeric Islands. The Spanish mainland is bordered to the south and east almost entirely by the Mediterranean Sea (except for a small land boundary with Gibraltar); to the north by France, Andorra, and the Bay of Biscay; and to the west by the Atlantic Ocean and Portugal.