These photographs appear to show a spectacular underwater world making it ideal for scuba divers – in central Europe. Twelve metres of water covers trees, footpaths, benches and bridges that are usually accessible throughout the year. Visitors to the Green Lake in Tragoess, Austria, that is normally only one metre deep, can leisurely stroll around the picturesque lagoon. Photo: A diver crossing a bridge in the flood water. (Photo by Solnet/The Grosby Group)

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.

Belgium fan wears a devil mask attends the Qatar 2022 World Cup Group F football match between Croatia and Belgium at the Ahmad Bin Ali Stadium in Al-Rayyan, west of Doha on December 1, 2022. (Photo by Stephane Mahe/Reuters)

Ferencvaros's David Siger lies on the ground to defend a free kick during the UEFA Champions League Group Stage match between Ferencvarosi TC and Juventus at Puskas Arena on November 4, 2020 in Budapest, Hungary. (Photo by Bernadett Szabo/Reuters)

A driver pulls a handgun on protesters after they broke his trucks lights on March 28, 2021 in Salem, Oregon. The protesters clashed with occupants of vehicles that had participated in an American flag-waving car caravan, despite law enforcements efforts to to keep the groups separate. (Photo by Nathan Howard/Getty Images)

Kubra Korkut of Turkey in action against Viktoriia Safonova of the Russian Paralympic Committee during Class 7 Group B Women's Singles Table Tennis Match on day 2 of the Tokyo 2020 Paralympic Games at Tokyo Metropolitan Gymnasium on August 26, 2021 in Tokyo, Japan. (Photo by Ivan Alvarado/Reuters)

A person waving the rainbow flag runs on the pitch as the players line up for the national anthems the UEFA EURO 2020 Group F football match between Germany and Hungary at the Allianz Arena in Munich on June 23, 2021. (Photo by Alexander Hassenstein/Pool via AFP Photo)

A plane belonging to U.S. missionary group Agape Flights burns after it was set on fire during protests demanding that the government of Prime Minister Ariel Henry do more to address gang violence including constant kidnappings, in Les Cayes, Haiti on March 29, 2022. (Photo by Duples Plymouth/Reuters)