The Phynx

The Phynx is a 1970 American comedy film directed by Lee H. Katzin about a rock and roll band named The Phynx and their mission in foreign affairs. The group is sent to Albania to locate celebrity hostages taken prisoner by Communists. The last part of the film, supposedly set in Albania, was filmed in the Spanish city of Ávila, recognizable by its medieval walls.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.