On the morning after breakfast to hotel transfer to explore Battambang, it is Cambodia's second-largest city and the capital of Battambang Province, which was founded in the 11th century. It is the former capital of Monton Khmer and lies in the heart of the Northwest of Cambodia. Until the war years, in which almost every infrastructure was destructed it was the leading rice-producing province of the country. Ride bamboo train is one of the world's all-time classic rail journeys and then continue to visit Damrey Sor Pagoda, Phnom Banan, Phnom Sampov and The killing caves of Phnom Sampeau are a Khmer Rouge execution site on Phnom Sampeau, a hill southwest of Battambang in western Cambodia. The Khmer Rouge killed their victims on top of the cave at the rim of a daylight shaft or ceiling hole and then threw the dead body into the cave. Men and women were placed in separate caves and clothes in another. There are a number of caves at Phnom Sampeau that have traditionally served as Buddhist temples. Today there is a large glass memorial in the cave next to the skulls and bones and a golden reclining Buddha that can be reached via a staircase and after that transfer back to hotel in Siem Reap.