A South Korea university student gets her head shaved during a protest against Japan's decision to release contaminated water from its crippled Fukushima nuclear plant into the sea, in front of the Japanese embassy, in Seoul, South Korea, April 20, 2021. (Photo by Kim Hong-ji/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.

Spanish journalist and writer Noemi Casquet attends the 26th Malaga Film Festival closing ceremony at the Cervantes Theater on March 18, 2023 in Malaga, Spain. (Photo by Carlos Alvarez/Getty Images)

A law enforcement officer stands guard near a damaged multi-storey residential building following an alleged Ukrainian drone attack in the course of Russia-Ukraine conflict, in Ramenskoye in the Moscow region, Russia on September 10, 2024. (Photo by Maxim Shemetov/Reuters)

Japan's Kaori Sakamoto performs during the Gala Exhibition at the World Figure Skating Championships in Saitama, Japan on March 26, 2023. (Photo by Issei Kato/Reuters)

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)

Cuban-American actress Ana De Armas shows off her freckles in Puerto Rico early September 2025. (Photo by ana_d_armas/Instagram)

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)