Spain is a part of the Schengen Agreement. As a result of this, it has relaxed border controls with other countries who have signed it and are a part of the EU. The national airline of Spain is known as Iberia. The country is very well-connected by flights and it is easy to travel within its borders by air. 

There is a regular train service between the neighboring country of France and Spain and owing to your Schengen Visa, its fairly easy to travel between these two countries via a high-speed train service.