HANG SON DOONG A group of hikers explores Hang Son Doong The cave rests in the middle of Phong Nha-Ke Bang National Park The hikers pass wide underground rivers and wander through huge caverns filled with soft mist Dark limestone walls rise over them 4
OTHER TOP SITES HA LONG BAY HOI AN ANCIENT TOWN HUE IMPERIAL CITY SAPA TERRACES Up ahead the hikers see a faint light They walk carefully toward it Soon they discover a vast bright space open to the sky Years ago the roof of the cave fell in at that spot Now towering trees and climbing vines grow there It is a thick beautiful jungle This is Vietnam 5
