In this July 29, 2021 file photo, the pillars of the massive Rosario-Victoria Bridge are exposed during a drought affecting the Parana River near Rosario, Argentina. At the port city of Santa Fe the river registered a level of 22 centimeters, the lowest in 50 years. (Photo by Victor Caivano/AP Photo/File)

Rohingya refugee sisters Nur Kaida (R) and Ruhana hug each other at their shelter at the Palongkhali refugee camp near Cox's Bazar, Bangladesh December 21, 2017. (Photo by Marko Djurica/Reuters)

Lake Baikal is the world's oldest lake, at 25 million years (possibly older), and deepest, averaging 744.4 metres (2,442 ft).

Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the world, containing roughly 20% of the world's unfrozen surface fresh water.

Relatives mourn over the shrouded body of Mohammad Abed, who is killed in an Israeli airstrike on a shelter in Gaza City, during his funeral in Gaza City, on April 19, 2025. (Photo by Majdi Fathi/NurPhoto/Rex Features/Shutterstock)

Honor guards are viewed during an official welcoming ceremony for Turkish President Recep Tayyip Erdogan by Albanian President Bajram Begaj, in Tirana, Albania on October 10, 2024. Turkish President Recep Tayyip Erdogan was welcomed by Albanian President Bajram Begaj with an official ceremony ahead of their meeting. (Photo by Mehmet Ali Ozcan/Anadolu via Getty Images)

A rainbow appears as people enjoy a warm afternoon on a tour boat at Niagara Falls in Ontario, Canada on October 21, 2024. (Photo by Mert Alper Dervis/Anadolu via Getty Images)

A gallery assistant poses for a photograph with an artwork entitled “John Perreault, 1972” by US artist Alice Neel during a press preview of “Alice Neel: Hot Off The Griddle” at the Barbican Art Gallery in London on February 15, 2023. (Photo by Justin Tallis/AFP Photo)

A penguin (Manchots Royaux) walks on the basement area, early morning on December 25, 2022, at the Kerguelen Islands, also known as the Desolation Islands, are a group of islands in the sub-Antarctic. (Photo by Patrick Hertzog/AFP Photo)