A Place That Stays With You – Tuol Sleng Genocide Museum

In the heart of Phnom Penh—not far from busy markets, modern shops, and the everyday rhythm of city life—stands a place that asks you to slow down, to listen, and to remember.

Tuol Sleng Genocide Museum.

At first glance, it looks like an ordinary school. A cluster of simple buildings around a courtyard. Balconies. Classrooms. The kind of place where you’d expect to hear the sound of children at play.

But as you pass through the gates, something shifts.

The noise of the city fades, replaced by a heavy, almost tangible silence. It’s the kind of silence that doesn’t invite conversation—it asks for reflection.

Between April 1975 and January 1979, this former high school—known as S-21 under the Khmer Rouge—became one of the regime’s most notorious detention and interrogation centers. Nearly 20,000 people passed through these buildings.

Only a handful survived.

Inside, the classrooms have been preserved much as they were found. Metal bed frames—used not for rest, but for torture—sit in stark, empty rooms. Shackles remain fixed to the floors. Barbed wire still lines the balconies, installed to prevent prisoners from attempting escape.

There is no need for dramatization here.

The truth is already overwhelming.

But what defines Tuol Sleng—what truly gives it weight—are the photographs.

Room after room, wall after wall, filled with portraits of the imprisoned. Men, women, and children. Each photographed upon arrival. Each staring into the camera, some with fear, some with confusion, some with a quiet resignation that is difficult to put into words.

These were not criminals in any meaningful sense. Many were teachers, doctors, engineers, monks—people whose education or perceived influence marked them as threats in the eyes of the regime.

They were forced to confess to crimes they had not committed. To name others. To sign statements that sealed not only their fate, but often the fate of those they loved.

Those who survived the interrogations here were eventually transported to sites like Choeung Ek Killing Fields, where they were executed and buried in mass graves.

Today, Tuol Sleng stands not only as a memorial, but as a place of education. Visitors move quietly from room to room, reading accounts, studying photographs, listening to the stories of survivors. There are no raised voices. No hurried footsteps. Just a shared understanding that this is a place where history must be faced directly.

I have visited other sites that bear witness to humanity at its worst—Dachau Concentration Camp Memorial Site and Hellfire Pass Memorial Museum among them.

But Tuol Sleng lingers in a different way.

Perhaps it’s the recency. The realization that while I was going about my life—thinking about school, about the future—this was happening, quietly and systematically, on the other side of the world.

That thought is difficult to shake.

A visit here is not easy. Nor should it be.

But it is important.

Because places like Tuol Sleng are not just about the past. They are reminders—of what can happen, of what has happened, and of the responsibility we share to remember.

I left in silence.

And I suspect a part of me will always remain there.

Until next time.

Inside the walls of Tuol Sleng