What Is The Ending Of 'El Túnel'?

I just finished reading 'El túnel' by Ernesto Sábato, and that ending left me staring at the wall for a good ten minutes. It’s one of those psychological rollercoasters where the protagonist, Juan Pablo Castel, spirals so deep into obsession that you almost see it coming—yet it still shocks you. The novel builds this suffocating tension between Castel and María Iribarne, his obsession, until it all collapses in a single, brutal moment. He murders her. Not in a fit of rage, but with chilling deliberation, as if it’s the only logical conclusion to their twisted connection. The way Sábato writes it feels inevitable, like watching a train wreck in slow motion. Castel’s narration is so detached afterward, recounting the act with eerie calm, that it makes your skin crawl. The tunnel metaphor? It’s literal by this point—he’s dug himself so far into isolation that even crime doesn’t free him. He turns himself in, almost relieved to be caught, because the guilt is quieter than the madness that drove him there.

What haunts me most isn’t the murder itself, but how Castel describes María’s final moments. She doesn’t fight. She seems to accept it, as if she’d foreseen this ending too. That resignation makes the violence even more horrifying. And then there’s the aftermath: Castel writing his confession from prison, trying to justify the unjustifiable. The novel ends with him still trapped in his own head, the tunnel now a prison of his making. No redemption, no grand revelation—just the bleak acceptance that some people destroy what they love because they can’t understand it. Sábato doesn’t wrap things up neatly; he leaves you drowning in the discomfort of Castel’s psyche. It’s brilliant, but god, it’s heavy.

I keep thinking about how the painting that first connects Castel to María becomes a symbol of their doomed relationship. A tiny figure in a vast landscape—just like Castel, alone in his obsession. The ending mirrors that painting: small, stark, and utterly hopeless. If you’re into stories that stick like tar in your brain, this one’s a masterpiece. Just maybe don’t read it before bed.