A home-made steam train, designed by Pavel Chilin, rides on a make-shift railway across country house neighborhood in the settlement of Ulyanovka in Leningrad region, Russia on November 4, 2019. (Photo by Anton Vaganov/Reuters)

A visitor jumps for a photograph on the world's highest and longest glass-bottomed bridge above a valley in Zhangjiajie in China's Hunan Province on August 21, 2016. The bridge, which opened to the public on a trial basis on Saturday, spans 430 meters (1,410 feet) and rises about 300 meters (984 feet) above a valley in a scenic zone, making it the world's highest and longest glass-bottomed bridge according to Chinese state media. (Photo by Fred Dufour/AFP Photo)

A Chinese tourist visits the Mutianyu Great Wall covered in snow on February 23, 2021 in Beijing, China. Affected by the new coronavirus (COVID-19), the number of visitors to Mutianyu Great Wall in 2020 dropped by about 60%. (Photo by Lintao Zhang/Getty Images)

Gail Couillard, of South Burlington, Vermont, waits with her dog, Lyndon, for Republican presidential candidate, former U.N. Ambassador Nikki Haley to take the stage at a campaign event at the DoubleTree Hotel on March 3, 2024 in South Burlington, Vermont. Despite having lost every state primary thus far to former President Donald Trump, Haley intends to stay in the Republican race at least through Super Tuesday on March 5. (Photo by John Tully/Getty Images)

Aryna Sabalenka, of Belarus, returns the ball to Magda Linette, of Poland, during the Mutua Madrid Open tennis tournament in Madrid, Friday, April 26, 2024. (Photo by Manu Fernandez/AP Photo)

Actresses perform during the Olympic flame lighting ceremony for the Paris 2024 Olympics Games at the Ancient Olympia archeological site, birthplace of the ancient Olympics in southern Greece, on April 16, 2024. (Photo by Angelos Tzortzinis/AFP Photo)

Robots of the Zurich Federal Institute of Technology play a football game during the International Telecommunication Union (ITU) AI for Good Global Summit in Geneva on May 30, 2024. (Photo by Fabrice Coffrini/AFP Photo)

Students from the Liceo Parini school celebrate the end of term in Milan, Italy on June 6, 2024. (Photo by Marco Ottico/LaPresse/Rex Features/Shutterstock)