Nearly all cities and towns have some kind of public transportation including buses and taxis which implies going around in Spain is not a difficulty.
Information about almost all kinds of public transport in Spain which includes airlines, airports in Spain, bus routes, driving maps and trains in Spain are listed on this page.
The tables underneath provides more information relating to the travel methods to get around Spain: Travel by rail, travel by air, and travel by bus and car.
Airports in Spain
Public Transport in Spain
Spanish Public Transport Questions