Phnom Penh and the Khmer Rouge Memorial Sites: Visiting With the Seriousness They Require

Fewer than 10 people survived S-21. That is not an estimate – researchers have verified the names. Around 17,000 passed through the prison between 1975 and 1979, and the regime kept photographic records of nearly all of them. Those photographs, rows of faces taken with the systematic detachment of a processing facility, are the thing most visitors remember longest.

Choeung Ek Genocidal Center

Choeung Ek, 15 kilometres south of central Phnom Penh, is the most significant of the mass execution sites used by the Khmer Rouge between 1975 and 1979. The regime killed an estimated 1.7 million people during four years in power – through execution, starvation, forced labour, and denial of medical care. Choeung Ek was used primarily for prisoners transferred from S-21 for execution.

The site includes a memorial stupa containing human skulls and bones excavated from the mass graves, clearly marked excavated pits, and an audio guide narrated in part by survivors. The audio guide is included in the entry fee of $6, is available in multiple languages, and is genuinely important: it structures a visit that would otherwise be overwhelming. Do not skip it.

The experience is not comfortable. Visible bone and clothing fragments appear in some grave areas. Some graves have not been excavated by deliberate policy decision. The Killing Tree – used to kill infants against its base because the guards did not waste ammunition on children – has hair, cloth, and bracelets tied to it by visitors as offerings. Allow two hours. Arrive before 10am if possible; the afternoon heat is oppressive and the midday tour group surge makes concentration on the audio guide harder.

The site is open daily from 7:30am to 5:30pm. Modest dress is required – covered knees and shoulders. An average tuk-tuk from the city centre costs around $12 to $15 return.

Tuol Sleng Genocide Museum (S-21)

Tuol Sleng is a former secondary school in central Phnom Penh converted by the Khmer Rouge into Security Prison 21. It is one block from Monivong Boulevard in Tuol Tom Poung district, reachable by tuk-tuk from the riverside in 15 to 20 minutes. Entry is around $6.

The prison is preserved largely as Vietnamese forces found it in January 1979, including the metal bed frames used for torture in the ground-floor rooms. The photography archive is the element most visitors find most disturbing: systematic records of every prisoner, catalogued by the regime itself with the bureaucratic thoroughness of an organisation that believed it would never have to answer for what it was doing.

Visiting both S-21 and Choeung Ek on the same day is possible but extremely taxing. Most people who attempt both in a single day find they cannot engage properly with the second site. Spacing them out is worth considering.

Phnom Penh Beyond the Memorial Sites

The Royal Palace and Silver Pagoda on the riverfront are the most visually spectacular sites in the city. The Silver Pagoda’s floor is covered in more than 5,000 silver tiles; an emerald Buddha and a full-size golden Maitreya Buddha studded with diamonds are kept inside. Parts of the palace complex remain in active use and access is restricted to certain sections.

The National Museum of Cambodia on Preah Ang Eng Street holds the best collection of Khmer sculpture outside the Guimet Museum in Paris. If you are continuing to Siem Reap to visit Angkor, a morning here first provides useful context for what you will see.

Malis restaurant on Norodom Boulevard serves upmarket Khmer cuisine and is among the best in the country. The street markets around Psah Thmei (Central Market) have excellent cheap food from early morning. The FCC (Foreign Correspondents Club) on the riverfront has a pleasant terrace and is worth a beer at sunset; the food is mediocre and not the reason to go.

Getting Around

Grab (the Southeast Asian ride-hailing service) is the most practical way around the city. Tuk-tuks are fine for short distances and negotiating a price in advance is standard. The riverfront promenade along Sisowath Quay is the main social area in the evening for both expats and residents.

Phnom Penh is roughly three to four hours from Ho Chi Minh City by direct bus, which makes it a natural addition to any Vietnam-Cambodia itinerary rather than a standalone destination requiring a dedicated flight.