Girls rest on stairs at the China Digital Entertainment Expo and Conference (ChinaJoy) in Shanghai, China July 27, 2017. (Photo by Aly Song/Reuters)

A father crosses a road with his twin daughters in Shanghai, China September 28, 2018. (Photo by Aly Song/Reuters)

An Afghan girl carries washed clothes on her head in Bamiyan, Afghanistan on March 2, 2023. (Photo by Ali Khara/Reuters)

Livestreaming saleswomen sell cars at the Auto Shanghai show, in Shanghai, China on April 19, 2023. (Photo by Aly Song/Reuters)

Runners dressed in Christmas-themed outfits compete during a charity Santa run in Shanghai, China, November 29, 2015. (Photo by Aly Song/Reuters)

A man stands next to a horsecart laden with oil drums on a street in Lahore on September 27, 2020. (Photo by Arif Ali/AFP Photo)

A family rides a bike amid rain in Lahore on October 16, 2023. (Photo by Arif Ali/AFP Photo)

The Y-40 Deep Joy is the worlds deepest pool. Y-40 is projected by Architect Emanuele Boaretto and supported by the “Boaretto Group Hotel and Resort”. The name Y-40 is inspired by mathematical symbols. “Y” is the ordinate axis of the Cartesian system and “–40” means the world's record depth or our pool- that is 40 meters underground. (Photo by Courtesy Y40 Deep Joy)