Phnom Penh Area Guide: Diamond Island (Koh Pich) – A Leisure Oasis Diamond Island, locally known as Koh Pich, is a satellite city located on the Mekong and Bassac Rivers in the Tonle Basak Intersection. Until 2000, the site was a swamp, but today it is being developed into a residential and business district. With … Continue reading Phnom Penh Area Guide: Diamond Island (Koh Pich)