River water is the main source of drinking water in Southeast Asia, including Vietnam, but increasing pollution means regular treatment methods cannot guarantee its safety. The high startup costs and ...

Vietnam’s ‘Nightmare’ sinkhole, 250 meters deep, remains largely unexplored, with fewer than 10 people ever reaching the ...

The height of the entire cave system ... flowing river flows inside this cave, due to which the cave was formed. A glimpse into the world’s largest cave The Son Doong Cave in Vietnam ...