A woman walks near a bus on fire as supporters of Brazil's President Jair Bolsonaro protest after supreme court justice Alexandre de Moraes ordered a temporary arrest warrant of indigenous leader Jose Acacio Serere Xavante for alleged anti-democratic acts, in Brasilia, Brazil on December 12, 2022. (Photo by Ueslei Marcelino/Reuters)

A person dressed as a gorilla is seen in front of French police standing in position during a demonstration as part of the tenth day of nationwide strikes and protests against French government's pension reform in Paris, France on March 28, 2023. (Photo by Nacho Doce/Reuters)

Security grab a Just Stop Oil protester during day one of the second Ashes test match at Lord's, London on Wednesday, June 28, 2023. (Photo by Mike Egerton/PA Images via Getty Images)

An activist shouts amid clashes with Lebanese riot police during a protest to demand the opening of Rafah border crossing between Egypt and the Gaza Strip, outside of the Egyptian embassy in Beirut, Lebanon, 22 February 2024. (Photo by Wael Hamzeh/EPA/EFE)

A fire burns during a protest near the National Congress, on the day Senators debate Argentina's President Javier Milei's economic reform bill, known as the “omnibus bill”, in Buenos Aires, Argentina, on June 12, 2024. (Photo by Mariana Nedelcu/Reuters)

A protester, wearing a dress in the colours of the Ukrainian flag, is detained by security after she covered herself in fake blood on the stairs on the Festival Palace ahead of the screening of the film “Acide” during the 76th edition of the Cannes Film Festival in Cannes, southern France, on May 21, 2023. (Photo by Christophe Simon/AFP Photo)

A mushroom cloud dwarfs a row of skyscrapers in what looks like a devastating nuclear bomb detonation. But thankfully this is just a spectacular weather-front blasting in from the tempestuous Rocky Mountains near Denver, Colorado, USA. The unbelievable shot is just one of many of the city's skyline taken by photographer Greg Thow. The 49-year-old has also captured equally stunning shots of lightning blasts and arching rainbows – all from the comfort of his balcony. (Photo by Greg Thow/Barcroft Media)

Son doong cave is a cave in Phong Nha-Kẻ Bàng National Park, Bố Trạch district, Quảng Bình Province, Vietnam. Currently the biggest known cave in the world, the cave is located near the Laos-Vietnam border. Inside is a large, fast-flowing underground river.
In early August 2013, the first tourist group explored the cave on a guided tour at a cost of US$3,000 each. The group had six members from Australia, Norway, Russia and USA and spent 7 days and 6 nights for the tour. Next exploration trips will be arranged.