For an extensive collection of online international maps, search the University of Texas's Perry-Castañeda Library Map Collection. Here you can find maps of Spain and other countries in Europe.
On campus, a wide range of maps can be found in the Maps Collection on the lower level of Wilson Library. If you prefer to start in the Undergraduate Library, the UL Reference collection has a variety of atlases, including international and historic. They are on an atlas case between the shelves holding call numbers PQ-PR. A few useful atlases are:
Atlas of World History. New York: Oxford University Press, 1999.
Undergraduate Library Reference, G1030 .O85 1999
National Geographic Atlas of the World.
Washington, D.C.: National Geographic Society, 1997.
Undergraduate Library Reference, G1021 .N38 1999
Oxford Atlas of the World. New York: Oxford University Press, 2003.
Undergraduate Library Reference, G1021 .A7545 2003