October 2020 marks the 70th anniversary of the Battle of Route Coloniale 4 (RC4), a major defeat for the French Expeditionary Force in Indochina along with Dien Bien Phu. Secret Indochina has been developing programs in the area of the former RC4 between Cao Bang and Ha Giang for some time, and to mark the anniversary

Kept secret for many years, the Khmer Rouge airport is located near Kampong Chhnang and Tonle Sap Lake in a green valley bordered in the west by Cambodia’s Cardamom Mountains. Now abandoned, the airport site covers 300 hectares and features two massive 2.4 km-long runways flanked by two giant moats, a control tower, administrative buildings, a quarry, a former prison camp, seven enormous cisterns, and tunnel-prisons.

Discover the A Luoi District, sandwiched between the western part of Central Vietnam’s mountainous Ashau Valley and the Laotian border (Saravane and Sekong Provinces), and gain insight into some of the strategic focal points during the Vietnam War.

The mythical Phu Pha Thi mountain, also known as Lima Site 85 or The Rock. Located in the Houaphanh Province of northeastern Laos, Phu Pha Thi reaches a height of 1,786 meters, appearing as a giant monolith extending from the heart of the Nam Et massif.