In central Phnom Penh, this memorial occupies a former high school that the Khmer Rouge turned into a secret prison and torture center known as 'S-21' from 1975 to 1979. An estimated 20,000 people were detained here, and only a handful of adults are known to have survived. The buildings have been left much as they were found in 1979, serving today as a place of remembrance and education about one of the 20th century's darkest chapters.
Building A's torture rooms, preserved with iron bed frames and photos of victims as found at liberation
Building B's photo archive, its walls covered with thousands of black-and-white prisoner portraits
An audio guide (about 90 minutes, in 11 languages) featuring survivor and family testimonies
The palm-lined courtyard and former classrooms converted into cramped brick cells and mass holding rooms
The chance to meet survivors (such as Chum Mey and Bou Meng) who sign and sell their memoirs on site
Good to know
MannersThis is a solemn memorial to genocide victims. Keep your voice low, avoid laughter and casual chatter, and set your phone to silent.
MannersOnly quiet, personal or research photography is allowed. Smiling selfies and playful or disrespectful poses are strictly unacceptable.
RulesA dress code applies: tops must cover the shoulders and not expose the midriff, and bottoms should fall below the knee. Sleeveless shirts, crop tops and skin-tight clothing may be refused entry (verify current rules).
CautionTuk-tuk drivers near the museum and riverfront often overcharge. Use a ride app (Grab, PassApp) or agree on the fare clearly before you get in.
SafetyDuring tuk-tuk or motorbike rides, keep bags and phones tucked inward β passing motorbike snatch-thieves target small, exposed items.
SeasonMarch and April can reach 40Β°C with high humidity, making the open-air visit tough. Bring water, a hat and sun protection; the cooler NovemberβFebruary mornings are the most comfortable.
Practical info
Open 08:00β17:00; foreign adult admission about US$5 (audio guide extra; verify current pricing). A tuk-tuk from the riverfront is roughly US$2β3 each way, and most visitors pair it with the Choeung Ek Killing Fields on a half-day hire (about US$12β18). Allow 2β3 hours for a thorough visit. Buying a survivor's book directly supports them.
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