Overview
Originally a high school, Tuol Sleng (S-21) became a secret prison from 1975-1979 where 14,000-17,000 people were detained, tortured, and killed under the Khmer Rouge. Now preserved as a museum, it displays prisoner photographs, torture instruments, and cells that vividly convey the brutality of the era. Together with the Killing Fields, it is essential for understanding Cambodia's darkest chapter. Korean audio guides are available. Admission USD 5 (+ USD 3 audio guide). In central Phnom Penh, about 10 minutes by tuk-tuk from the Royal Palace.
Opening Hours
Daily 08:00-17:00
Travel Tips
It's emotionally heavy — go in a calm state of mind. Visiting with the Killing Fields the same day is efficient, but consider your emotional bandwidth.
Hotels near Tuol Sleng Genocide Museum (S-21)
Hotels and guesthouses in Phnom Penh, Boeng Keng Kang 3, Phnom Penh
Other attractions in Phnom Penh
Royal Palace
The official residence of Cambodia's king, showcasing ornate Khmer architecture.
Killing Fields (Choeung Ek)
A solemn memorial that commemorates the tragedy of the Khmer Rouge era.
National Museum of Cambodia
Cambodia's largest museum, housing an extensive collection of Khmer art and sculpture.
Wat Phnom
The Buddhist temple on a 27 m hill that gave Phnom Penh its name.
Russian Market (Psar Toul Tom Poung)
Phnom Penh's go-to market for bargaining on souvenirs, silk, and jewelry.
Sisowath Quay (Riverside)
The riverfront promenade where the Mekong and Tonle Sap rivers meet — famous for sunsets and a night market.
Central Market (Phsar Thmei)
Phnom Penh's Art Deco market beneath a striking yellow dome.