This piano movement is known as both "Asturias" and "Leyenda". The Spanish composer Isaac Albeniz included the piece within his "Cantos de España", and after his death a music publisher also added it to the "Suite Española" which has caused some confusion over the years. It is a very evocative piece and was later arranged for classical guitar by Andres Segovia. (Here is a young John Williams playing a guitar arrangement on youtube.) The music has also been used in the UK on television adverts for Scottish Widows. Below you can play a graphic video of the music or the mp3 file alone and see the piano sheet music before downloading.
Here is a video of Albeniz' Asturias (Leyenda) for piano:
The audio controls below allow you to play the mp3 version of Albeniz' Asturias (Leyenda) for piano or you can download the MP3 file. You can also download the midi version of Albeniz' Asturias (Leyenda) for piano.
The image below is the first page of the sheet music, and here you can download the full sheet music for Albeniz' Asturias (Leyenda) for piano in PDF format.