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This photo in NatGeo in January shows a tourist standing inside Son Doong, the world’s largest cave, as the sun shines down.
“To take this photo, I woke up at 5 a.m., went through the usual trekking route that usually takes around 1.5 days in some four hours and waited for the first rays of sunlight to penetrate deep into the cave,” Viet said.
A four-day-three-night expedition of Son Doong Cave costs VND69.8 million (around US$3,000) but numbers are strictly limited every year.
During the expedition, tourists can explore the cave together with an expert, see unique underground rainforests and scale the 90-meter “Great Wall of Vietnam” at the end of the cave with ropes and ladders.
They get three freshly cooked meals every day and sleep in some of the world’s greatest campsites.
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