A dog is kept at a pen at the newly opened Central Zoo in Pyongyang, North Korea, Tuesday, August 23, 2016. One of the most popular attractions at the zoo might come as a surprise to foreign visitors. Just across the way from the hippopotamus pen and the reptile house, dozens of varieties of dogs, including schnauzers, German shepherds, Shih Tzus and Saint Bernards – are on display in the “dog pavilion”. (Photo by Dita Alangkara/AP Photo)

A dog with a cherry blossom-shaped pin, is seen in the cherry blossom festival in Seoul, South Korea, Sunday, April 9, 2017. (Photo by Lee Jin-man/AP Photo)

Torchbearers Charles Antoine Kouakou, Fabien Lamirault, Elodie Lorandi, Nantenin Keita and Alexis Hanquinquant gesture after lighting the Cauldron to conclude the opening ceremony of the Paris 2024 Summer Paralympic Games at Place de la Concorde on August 28, 2024 in Paris, France. (Photo by David Ramos/Getty Images)

Women wait for customers at the fish harbour in Kasimedu Fish market, Chennai, India, on June 26, 2024. (Photo by Riya Mariyam R./Reuters)

A giant river otter, the world's largest otter species, looks out of its enclosure at the newly completed River Safari in Singapore, on March 25, 2013. (Photo by Wong Maye-E/Associated Press)

A ring-tailed lemur is pictured at Zoom Torino, a zoological park in Cumiana near Turin, on April 22, 2015. Zoom Torino is a new immersive zoological park, where animals can be seen without bars or cages, only natural barriers ensure the visit. (Photo by Marco Bertorello/AFP Photo)

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.

The company selling wedding dresses with designs made of local and wild grass, exhibited its new collection with local and foreign models consisting of Mesopotamian motifs by organizing a fashion show at Dara Ancient City in Mardin, Turkiye on February 26, 2025. (Photo by Halil Ibrahim Sincar/Anadolu via Getty Images)