Angkor Borei and Phnom Da
The ancient Funan sites of Angkor Borei (Khmer: អង្គរបុរី, lit. 'city of cities') and Phnom Da (Khmer: ភ្នំដា, lit. 'stone mountain') are located in the Angkor Borei District, Takéo Province, of southern Cambodia. They are both in the southern part of Cambodia, about 10 kilometres (6.2 mi) from the western split of Mekong river delta, 150 kilometres (93 mi) from the seacoast, near the Vietnam border and the Óc Eo site.
Source: Wikipedia — Angkor Borei and Phnom Da (CC BY-SA 4.0)