One website that provides maps in Spanish is MapsofWorld.com that has a free world map with the names of countries and the oceans in Spanish. Another option for Spanish maps is WorldMapsOnline.com that sells physical maps for walls in Spanish.
These include maps of the world, Spain, South America, Central America and Mexico. Lastly, a source for online maps in Spanish is to use Google Maps in the Spanish version. To do so, type in www.google.es/maps and it functions in Spanish. The names of places will not translate into Spanish but still helps a Spanish-speaker access the maps more easily.