Diplomats from the UK, Sweden, Vietnam, Italy, the U.S., Argentina, the Czech Republic and Australia raise their national flags in Son Doong Cave in Quang Binh Province during their expedition from May 11 to 17, 2016.
The explorers listen when a tour guide talks about poisonous trees which they should not touch on the way.
L to R: Giles Lever, Cecilia Piccioni and Camilla Mellander, Ambassadors of the UK, Italy, and Sweden, visit a class in Doong Village on the way to Son Doong.
The delegation poses in front of En Cave, the first stay of the expedition to Son Doong Cave.
The ambassadors talk to the porters when they stayed in En Cave.
The explorers walk through a spring during their trip.
U.S. Assistant Secretary of State Tom Malinowski swings down an 80m hole.
Secretary-General of the Vietnam National Commission for UNESCO Pham Sanh Chau is seen with a wound on his heel. Some ambassadors also sustained injuries caused by leeches or rocks.
Martin Klepetko, Hugh Borrowman, and Cecilia Piccioni, Ambassadors of the Czech Republic, Australia and Italy, put on protective gear before passing a spring.
The trip was tiring but all the delegates tried their best to overcome obstacles and follow experts’ safety rules.
Beauty queen Duong Truong Thien Ly enjoys cool water in the cave.
Secretary-General of the Vietnam National Commission for UNESCO Pham Sanh Chau stands on a rock called “Hand of Dog” before reaching the first doline in Son Doong.
L from R: Ambassadors of the Czech Republic, Australia, Sweden, the UK, U.S. Assistant Secretary of State, and Ambassador of Italy sing together under the magical light in the first sinkhole.
Beauty queen Duong Truong Thien Ly and U.S. Assistant Secretary of State Tom Malinowski pose for a picture after they played a game with the trip’s porters.
The diplomats pose with their national flags at the first sinkhole.
Australian Ambassador Hugh Borrowman stands on the famous “heaven rock” of Son Doong Cave.
A part of the forest at the cave’s second sinkhole.
The delegation has dinner together.