About half-way up the cement access road to the summit, a turn-off leads 250m up the hill to the Killing Caves Phnom Sampeau. An enchanted staircase, flanked by greenery, leads into a cavern where a golden reclining Buddha lies peacefully next to a glass-walled memorial, dedicated in 2007, filled with the bones and skulls of some of the people bludgeoned to death by Khmer Rouge cadres before being thrown through the overhead skylight.

Recently, Killing Caves Phnom Sampeau became a popular place for local tourists and a main travel attraction site for international tourist. This historical place is a major place for students do a research during visit it.