There is bouldering in Cambodia

Bulbous boulders of hard sandstone litter the path up to the 'spectacularly carved riverbed' at Kbal Spean, deep in the jungle about 40 km NW of Siem Reap. 

Good slabs, pockets, inset pebbles, and edges abound. Watch this space. Keep the chalk down though, or you'll get told off by the wardens, who take an admirably ethical stance on use of the white stuff.