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)

Scuba divers during an ice diving class at the Sea Frogs scuba diving center in the Russian Far Eastern city of Vladivostok on January 30, 2022. The air temperature is –11°C (12.2°F), the water temperature is –2°C (28.4°F). Scuba divers undergo theoretical and practical training in ice diving and perform dives in the open water during the day and the night time as part of the Ice Diver NDL special program. (Photo by Yuri Smityuk/TASS)

Divers perform during a Christmas-themed underwater show at the Aqua Planet 63 aquarium in Seoul on December 8, 2022. (Photo by Anthony Wallace/AFP Photo)

A girl looks on at a diver dressed as Santa Claus performing during a promotional event for Christmas in Seoul, South Korea on December 3, 2021. (Photo by Kim Hong-Ji/Reuters)

Diver Sven, still in disguise, cleans the aquarium glass after a Santa Claus visit to the fish at Sea Life Berlin on December 6, 2021. (Photo by Christoph Soeder/dpa)

Divers perform during an event to celebrate the upcoming Christmas at the aquarium in Seoul, South Korea, Friday, December 1, 2023. Christmas is one of the biggest holidays celebrated in South Korea. (Photo by Lee Jin-man/AP Photo)

A diver in a pool at the Army 2021 International Military and Technical Forum, at the Patriot military park in Moscow Region, Russia on August 22, 2021. (Photo by Sergei Karpukhin/TASS/Alamy Live News)

A diver dressed as “Mermaid of the Serpent Depths” performs in front of a sign marking the Lunar New Year of the Snake inside an aquarium at Manila Ocean Park on January 28, 2025. (Photo by Jam Sta Rosa/AFP Photo)