A girl with her face painted to look like the popular Mexican figure called "Catrina", jumps as she takes part in the annual Catrina Fest in Mexico City November 1, 2015. (Photo by Carlos Jasso/Reuters)

A girl washes the body paint off her arm on the shore of Lake Balaton during the coinciding Strand Festival and B.My.Lake Festival in Zamardi, 110 kms southwest of Budapest, Hungary, 24 August 2016. (Photo by Zoltan Balogh/EPA)

A girl poses at an entrance of her house next to a bomb dropped by the U.S. Air Force planes during the Vietnam War, in the village of Ban Napia in Xieng Khouang province, Laos September 3, 2016. From 1964 to 1973, U.S. warplanes dropped more than 270 million cluster munitions on Laos, one-third of which did not explode, according to the Lao National Regulatory Authority. (Photo by Jorge Silva/Reuters)

Beneath the Swedish capital lies an intricate web of underground train lines. More than 90 of the 100 stations in the 110km tunnel system, sometimes referred to as “the world’s longest art gallery”, have been decorated with paintings, installations, mosaics and sculptures by 150 artists since the 1950s. After spending a couple of weeks exploring arctic Norway and Sweden, London-based travel photographer Conor MacNeill headed underground to capture images of the metro stations. Here: A rainbow arcs over a girl on the platform of Stadion station. (Photo by Conor MacNeill/The Observer)

A girl has her helmet adjusted on the top of a tank during the Children's Day celebration at a military facility in Bangkok, Thailand January 9, 2016. Army barracks opened their doors to children to interact with their weapons and vehicles as part of the celebration. (Photo by Jorge Silva/Reuters)

Teenage girls at a drinking fountain in Hyde Park in Central London on August 9, 2022 after weeks with no significant rain and unprecedented high temperatures. Many parts of southern England and Wales are facing drought conditions and preparing for emergency water measures. (Photo by Sarah Lee/The Guardian)

A girl walks past destroyed houses at Basara refugee camp in Sittwe on May 16, 2023, after cyclone Mocha made a landfall. The death toll in cyclone-hit Myanmar's Rakhine state rose to at least 41 on May 16, 2023, local leaders told AFP. (Photo by Sai Aung Main/AFP Photo)

A young exiled Tibetan girl gets her lips painted by her teacher before she performs a traditional dance at an event to celebrate the 89th birthday of Tibetan spiritual leader the Dalai Lama at the Tsuglakhang temple in Dharamshala, India, Saturday, July 6, 2024. (Photo by Ashwini Bhatia/AP Photo)