Analog Cambodia has an interesting piece about Phnom Bros and Phnom Penh Srei (Man and Woman Hill) of Kampong Cham prvince.

The two hills have housed temples and been places of worship for possibly hundreds of years, but the temples currently there date from the mid 20th century. Like most temples of their kind and age they were used by the Khmer Rouge for a prison and torture centre. The dark days are long behind the hills now and the hilltops temples have been restored and, in true Khmer style, house beautiful yet garish paintings on the walls and ceiling.