Sir Michael Caine lists this, along with The Swarm (1978) and Ashanti (1979), as one of the worst movies he ever made. This is mainly down to the fact that no one, least of all the audience, knew what it was about.
A critical and commercial disaster. Screenwriter John Fowles laid most of the blame at the feet of director Guy Green (despite Fowles having penned the screenplay). Fowles vowed never to write another screenplay after this (nor did he). The only subsequent adaptation of any of his works was Karel Reisz's The French Lieutenant's Woman (1981), which was adapted by Harold Pinter.
Though this movie was set in Greece, the majority of it was filmed in Majorca, Spain.