Trapeang Kaek (GPS: 13.336262, 103.956481) is an Angkor temple located to the west of Roluos Group. My friend Nic Boulton came across it beside the road side. For a number of years, we were not able to identify it, as his attempts to ask the locals yielded a name that sounded like "Kirchamoor". Nevertheless, with improvement in geolocation, I was finally able to identify the ruins as Trapeang Kaek.
Trapaeng Keak is a lone prasat located on the north side of the road, about one kilometer to the west of Bakong. The name trapaeng, I learn, means pond or small lake, though Trapaeng Kaek is not a lake but a prasat, or temple tower. Unfortunately I do not know much about Trapaeng Kaek, other than its name as appearing on Google Maps. I do not know how old it is or who built it.