From the turnoff to Ta Mok’s house, driving a further 7km north takes you to Tumnup Leu village, where a signposted right turn brings you 200m to a fork. Take the left fork and proceed another 200m to Ta Mok’s Angkorian-style mausoleum, built by a rich grandson in 2009. The cement tomb bears no name or inscription. Locals come here to light incense and, in a bizarre local tradition, hope his spirit grants them a winning lottery number.
The mausoleum is on the grounds of a modest pagoda; take a hard right (south) as you enter the grounds to find the grave.