Tuol Sleng Genocide Museum (S21)

The place in a few words

The Tuol Sleng Genocide Museum, also known as S21, is one of Cambodia’s most important memorial sites. This former high school in Phnom Penh was turned into a detention, interrogation and torture centre by the Khmer Rouge between 1975 and 1979. Thousands of people were imprisoned here, often before being executed. Today, its preserved cells, photographs and testimonies offer a powerful insight into one of the darkest chapters of the country’s history.

What we loved

It’s hard to talk about what we ‘loved’ when this visit affected us so deeply. We spent nearly three hours walking through the former classrooms, listening to testimonies and learning about the atrocities committed in these buildings. Beyond the violence itself, what struck us most was seeing how an ideology could drag an entire country into murderous madness. We left with so many questions and a feeling that’s difficult to put into words. It’s certainly not an enjoyable visit, but probably the one that left the deepest impression on us in Phnom Penh.

Our tip

Definitely get the audio guide, which is available in many languages. It provides essential context for the rooms and testimonies. Allow two to three hours, and give yourself some time afterwards to process what you’ve seen: this visit can be emotionally overwhelming. We didn’t visit the Killing Fields of Choeung Ek straight afterwards. S21 had already affected us so deeply that we needed a little time to take it all in.