Bag snatching and how people get hurt
Phnom Penh and Siem Reap both have a persistent problem with thieves on motorbikes grabbing bags, phones and cameras from pedestrians and from passengers in tuk-tuks. The serious injuries come from being pulled off your feet or out of the vehicle.
Wear bags across the body on the side away from the road, or better, not at all. Do not walk holding a phone. If you are grabbed, let go — the bag is not worth being dragged.
Landmines and unexploded ordnance
Cambodia remains one of the most heavily mined countries in the world, concentrated in the northwest along the Thai border in Battambang, Banteay Meanchey, Pailin and Preah Vihear.
The rule is simple and absolute: stay on marked paths and well-used tracks, never enter fields or forest off-trail, and never touch metal objects on the ground.