The Horror of Visiting S21 + The Killing Fields in Phnom Penh, Cambodia

By far, the most horrific, terrible sites that we saw in Southeast Asia were the Tuol Sleng Genocide Museum (S21) and the Killing Fields in Phnom Penh, Cambodia–and while absolutely no one would call the experience fun, we consider them among the most important places to visit in the region.

These sites are relics of the genocide perpetrated by the Khmer Rouge in the 1970s, and are among the darkest of dark tourism sites in the world (the only other place we can personally compare visiting them to is Auschwitz in Poland).

As difficult as our visit to Auschwitz-Birkenau was, we were also as prepared as we could be for it: we had studied the history of World War II and the Holocaust from young ages in school, Anne Frank was a household name, numerous books surrounding the Holocaust made our required reading lists in literature classes, and we knew the facts behind what went on in the camp before we went there.

exterior facade of tuol sleng genocide museum cambodia

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Visiting S21 and the Killing Fields in Phnom Penh was different.

If Auschwitz deepened our understanding of a disturbing historical event that we already understood on a surface level, learning about the Khmer Rouge in Cambodia was a punch in the gut that roughly alerted us to just how little we knew about another genocide, closer in time to ourselves and yet untouched by our schools.

If you’re considering a visit to the Tuol Sleng Genocide Museum and the Killing Fields when in Cambodia, we strongly recommend it.

Here’s what to expect when you visit.

wooden doors in tuol sleng prison in phnom penh cambodia

A Brief History of the Khmer Rouge

I am far from an expert on the Khmer Rouge–to be honest, other than the fact that there was something called the Khmer Rouge and that some terrible person named Pol Pot made the list of horrific dictators the world has seen because of it, I couldn’t have told you a single thing about it before visiting Cambodia.

In very brief summary: Pol Pot was a communist-turned-dictator who endeavored to return Cambodian society back to “Year One”–in Pol Pot’s mind, utopia would be achieved through a strictly agricultural society and getting back to the good ole days of yore.

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Pol Pot’s regime, commonly referred to as Angkar (not to be confused with Angkor, as in Angkor Wat), emptied the cities and relocated almost the entire population of Cambodia to the country.

Rice production was demanded from Cambodians, and expected to be grown in equally large amounts throughout Cambodia–with no regard for soil quality or farming expertise.

Anyone educated was suspect to the regime, as was anyone who came from a city. Families were split up, forced marriage for the good of Angkar was practiced, there was no schooling or education, and the country began to starve.

sign denoting inhumane rules for prisoners at tuol sleng genocide museum

As totalitarian regimes are wont to do, Angkar heavily persecuted anyone who slighted them in a real or imagined way and performed extreme torture to achieve “confessions” before killing their victims.

The families of “traitors” were also murdered, to avoid leaving anyone to take revenge on the regime.

Most famous of these torture centers and resulting mass graves were Tuol Sleng Genocide Museum, commonly referred to as S21 (the building was a school prior to the Khmer Rouge), and what we now know as The Killing Fields, both located in Phnom Penh.

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There are estimated to be around 200 Killing Fields in Cambodia–this is far from the only one, a very difficult fact to grapple with when touring the museum.

The Khmer Rouge ruled Cambodia from 1975 to 1979.

In the end, a combination of the inhumane living and working conditions of the majority of the population, food shortages, persecution, and torture resulted in the death of roughly 21% of Cambodia’s population.

Estimates put the total number of deaths somewhere between 1.5 and 3 million, but the exact figure is lost to time.

sign marking mass grave at killing fields cambodia

Visiting the Tuol Sleng Genocide Museum (S21)

When we arrived at S21, it was beautiful: the sun was shining, the flowering trees in the courtyard (leftover from when the building was a school prior to 1975) were blooming, and there was a breeze.

We collected our audio guides, sat down on a bench, and started listening.

It started out horrifying. Then it got worse.

The tour led us through the classrooms-turned-torture chambers, complete with photos of the decimated bodies that the S21 operatives killed quickly and left behind when they knew that Vietnamese soldiers were on their way to take the city in 1979.

The photos were horrific–but grainy. You could avoid the humanity in the images if you tried.

view of the courtyard with flowering trees at tuol sleng phnom penh cambodia

The same could not be said for the next rooms: following in the tradition of many other totalitarian regimes, Angkar kept meticulous records of the victims of S21, including large individual photographs that were taken of the victims upon arrival.

The photographs are on display–hundreds of them–each more haunting than the last.

We ended up spending more than 3 hours at S21 to listen to all of the audio and take in the impact of the place.

Large torture devices are intact and on display, as well as the cells where prisoners were kept, and (well done artistically but utterly disturbing) paintings done by a former prisoner, showing the conditions of the prison, and examples of some of the torture that happened within its walls.

prison cell in tuol sleng genocide museum with wire bed

We closed our day there by listening to a talk by a man who was relocated to the country during the Khmer Rouge as a boy. He survived… but not before being ripped from his family and having his father murdered in front of him.

S21 was horrible to digest: everywhere you looked, everywhere you turned, something horrible and inhumane had happened.

Roughly 14,000 people are known to have been brought to S21. Seven of them survived.

view of a rough doorway carved into a wall at s21 cambodia

Visiting the Killing Fields in Phnom Peh

They say that you are supposed to see S21 and The Killing Fields Museum in one day.

Frankly, we couldn’t take it: we did them on two separate days.

Like Auschwitz-Birkenau, like S21, the Killing Fields look beautiful when you first approach them.

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Originally, the location was used as a burying ground for the Chinese minority group that lived in Phnom Penh. During the Khmer Rouge, Angkar took over the fields and turned them into mass graves.

In the same format as at S21, an audio guide led us through the area, complete with haunting firsthand accounts of the Khmer Rouge and descriptions of the torture and death imposed on the fields.

Bullets were valuable, so most of the victims were bludgeoned to death: including the babies, many of whom met their fate by being swung against a large oak tree, now calling “The Killing Tree”.

You can still see blood on the tree. I could hardly look at it.

killing tree with memorial bracelets on it at the killing fields cambodia

In the 1970s, when the murders would happen under the cover of night (Angkar wanted their activities to be kept secret), gratingly loud propaganda music would screech out of speakers set up through the fields.

When we heard some of it toward the end of our tour, my hair stood on end. Its only purpose, after all, was to drown out the cries of the dying.

The Killing Fields tour closes at this beautiful building:

memorial building at the killing fields phnom penh cambodia

At least, it looks beautiful… until you see what it is.

The building is filled to the top with bones, many of the excavated victims, all carefully organized: Men over 50. Women under the age of 25. Children under the age of 10.

Our tour of the Killing Fields was a bit shorter than S21–about 2 hours–but it was no easier to experience.

collection of human skulls displayed in memorial building honoring victims of khmer rouge killing fields museum

Why You Should Visit S21 + The Killing Fields in Cambodia

These are both very well done museums, and I would encourage anyone who comes to Phnom Penh to add them to their plans.

It is abundantly obvious at both places how much the Cambodians who work there care about awareness and want people to visit.

The audio guides are available in many languages and are very detailed, complete with a standard tour and supplementary interviews and stories that you can choose to listen to for more context.

In-person guides are not required, but you can arrange one if you prefer.

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I am very glad that we saw S21 & the Killing Fields… but, like Auschwitz-Birkenau, I don’t expect to go back. Some things you only need to see once.

Personally, I am still digesting our visit to Cambodia in general, but especially these sites.

The fact that the Khmer Rouge killed up to two million people within my parent’s lifetimes and I didn’t learn about it in school–not even in college when getting my B.A. in Political Science, of all things!–astounds me.

view of tuol sleng genocide museum from second floor balcony

This is one of many things in Southeast Asia (the impacts of the Secret War in Laos as demonstrated by Vientiane’s COPE Visitor Center being another prime example), that have made me reflect on just how vast history is, and how impossible it is to learn it all… but also on how we deem some stories more worth telling than others.

Perhaps the most powerful takeaway from learning about the Khmer Rouge? Just how recent it was: the cities of Cambodia were only refilled a mere 37 years ago.

While how far away in time that date appears is a matter of perspective, it was a date that I thought about every time I saw a middle-aged person or older in Cambodia, whether they were working at a fruit stand, or talking on a cell phone, or playing with a child: You survived the Khmer Rouge. You were ripped from your home, starved, maybe tortured, maybe pulled from your family.

And you’re still here. Just like you… and you… and you…

pile of skulls of victims of khmer rouge cambodia

About Kate Storm
Image of the author, Kate Storm

In May 2016, I left my suburban life in the USA and became a full-time traveler. Since then, I have visited 50+ countries on 5 continents and lived in Portugal, developing a special love of traveling in Europe (especially Italy) along the way. Today, along with my husband Jeremy and dog Ranger, I’m working toward my eventual goal of splitting my life between Europe and the USA.

2 thoughts on “The Horror of Visiting S21 + The Killing Fields in Phnom Penh, Cambodia”

  1. Hi Linda here from New Zealand. I have just discovered your travel blog and think it is so awesome to read and find out things about all these amazing places you have visited. Hubby and I are planning a trip to Europe maybe for 2023 or 2024 depending on what happens with Ukraine ( been told plenty of times to just go and travel and not worry about it all….). The thought of doing Europe is a bit daunting but it is something I want to do again ( maybe for 3-6months). I did Contiki when I was 20 and loved it. My parents were from Holland and I have a lot of family there, so definitely would love to go there. So awesome finding your page as there is so much on it which will help me with planning our trip. I am excited to find your page as will be taking notes and reading my way through it all. What a wonderful life you are both living and I love that you are sharing it too. Thanks Linda By the way as a thought- do you offer guided tours anywhere through Europe? Cheers

    • Hi Linda!

      Thanks so much, that’s great to hear!

      It’s definitely true that outside the of the impacted countries, life in Europe continues as normal. We live here and are traveling widely with no reservations (as, it seems, is everyone else–things are busy over here this summer!).

      We don’t offer guided tours or anything like that, though I’m flattered you ask. I’m sure you’ll have an absolute blast visiting again, though, and highly recommend it!


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