I recently visited a province in Lao PDR. Apparently, it was one of the most bombed provinces, in the most bombed country in the world. Non-government organisations like the Mining Advisory Group play an important role in clearing a number of unexploded ordinance (UXO) that still litter the country.
This is just one of the marker that they place in a parthway after they clear an area with UXO. Walk between these markers and you’re safe.