Prolific and ever-changing Spanish rocker Bunbury's underappreciated treasures include "El Solitario," a tune by Colombian vallenato king Alfredo Gutiérrez featuring peerless Los Lobos guitarist David Hidalgo; "Corre por la Jungla," a twangy take on Creedence Clearwater Revival's "Run Through the Jungle"; and the suave tango original "Adiós Compañeros, Adiós."