Ice Age – Tibet, China. “This is the Chinese version of the blue ice lake, Pumoungcuo, at an altitude of 5,070 metres (16,600 feet). This lake in Tibet freezes every winter. At night, under the low temperatures of -20C, you can listen to the sound of the ice cracking while capturing the most beautiful winter sky. The blue ice surface and dazzling Orion constellation create a fantasy landscape. I felt so happy to have the stars as my companion on this magical night”. (Photo by Daniel Zafra Portill/Milky Way Photographer of the Year)

People watch as workers inflate a near-10 metre high giant spider by Singaporean artist Jackson Tan in Singapore's Marina Bay financial district on February 6, 2017. The spider is one of several inflatable creatures that will form the Art-Zoo, a section created by Singaporean artist Jackson Tan for the iLight Marina Bay annual light-art festival in the city-state. (Photo by Roslan Rahman/AFP Photo)

Monumental landscape artwork “Hush” by installation artist Steve Messam hangs in the moors of Teesdale on July 18, 2019 in Barnard Castle, England. The outdoor installation is inspired by the geology, mining history and landscape of the area. It hangs over Bales Hush, a deep gauge in the terrain created when miners flushed the area with water to reveal the geological riches below. Hundreds of metres of recyclable saffron yellow fabric blow in the wind. (Photo by Christopher Thomond/The Guardian)

This handout picture taken on September 30, 2017 and released on October 4, 2017 by the Batang Gansal Police shows villagers beside a 7.8 metre (25.6 foot) long python which was killed after it attacked an Indonesian man, nearly severing his arm, in the remote Batang Gansal subdistrict of Sumatra island Hungry locals later killed the snake and displayed its carcass in the village before dicing it up, frying it and feasting on it. (Photo by AFP Photo/Batang Gansal Police)

A competitor takes part in the World Bog Snorkelling Championships held at the Waen Rhydd peat bog, Llanwrtyd Wells, Mid Wales, on August 27, 2023. The race is held along a 55-metre bog trench, in which the contestants must complete two lengths. Conventional swimming strokes are not allowed, though snorkels and flippers are mandatory. (Photo by Geoff Caddick/AFP Photo)

A man carries a child in a wheelbarrow near a burning tire barricade in the framework of the protests of the last three days due to the increase in fuel prices, in Port-au-Prince, Haiti, 09 July 2018. Haiti was today practically paralyzed by a transport strike after three days of violent riots due to an increase in fuel prices, which the Government left without effect shortly after the announcement. The Prime Minister, Jack Guy Lafontant, today heads a meeting with representatives of Parliament to assess the situation created after the violent protests, which have left at least three dead and several injured. (Photo by Jean Marc Hervé Abelard/EPA/EFE)

La Traviata chandelier is positioned on stage at Mrs Macquarie's Point on March 16, 2012 in Sydney, Australia. Covered with 10,000 Swarovski crystals, the 9 metre high chandelier will be hung above the performing stage of the La Traviata Opera. (Photo by Brendon Thorne/Getty Images)

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.