Las orejas del diablo

The early part of this story is the routine innocent-man-sent-to-prison story. Once Sterling Hayden arrives at the prison, however, things improve because of the unusual nature of the prison. It's located in a canyon near the southwestern tip of New Mexico. The canyon walls are more than 200 feet tall and beyond them lies a waterless desert patrolled by Pima Indians anxious to earn a reward for capturing any escapee. Prisoners are kept in underground cells. Punishment consists of being baked in metal coffins half-buried in the sand, or being whipped at a teasingly slow pace which allows the pain of each blow to sink in before the next one is delivered.

Seeing how Sterling Hayden reacts to this environment and how he eventually overcomes it makes for a western which rises a bit above its standard materials.