Interesting to learn that sand has to remain wet in order to be more stable, I guess it makes sense, one can not build a sand castle with dry sand
It is not that it has to be wet all the time, as that alternating wet and dry causes the soil to expand and contract, and the expansion and contraction of the soil wrecks the buildings. The Siem Reap area has a rainy season (May to October), so keeping the soil dry all the time was not an option, so it had to be wet.
