"Río Ancho" is a Spanish flamenco guitar piece that combines flamenco and gypsy jazz influences. The piece is in the key of E minor and progresses to A minor, D, G, C and B7. The original performances of the song had notable flute solos towards the end of the piece, reminiscent of classic Spanish gypsy music with trumpets. The track first featured on Paco de Lucia's 1976 album Almoraima. A shorter version was included in the November 1996 album Pavarotti & Friends for War Child.