Vietnam’s Son Doong cave, the largest in the world, could hold a 40-story skyscraper inside. The pristine ecosystem has its own river and jungle. Despite its size, Son Doong wasn’t discovered until 1991. It was lost again for nearly two decades and was fully explored for the first time in 2009. (Photo by Jason Speth/HuffPost)

17-year-old dance student Amelia Hubbard of Halesowen, West Midlands, takes to the park in south Birmingham, United Kingdom on April 14, 2022 to do some spring moves, as temperatures soar in the UK on Good Friday.(Photo by Peter Lopeman/Alamy Live News)

The dramatic moment lightning strikes the sea at Portland in Dorset in southwest England on October 24, 2022. Thundery weather and a dramatic Lightning storm pictured last night at Portland Bill. (Photo by CharlotteChapman/Bournemouth News)

Woman and man playing domination games in bed. (Photo by NDAB Creativity/Rex Features/Shutterstock)

The DFDS King of seaways enters the Mouth of the Tyne on the North East coast in Rough sea on Wednesday, January 18, 2023. (Photo by Owen Humphreys/PA Images via Getty Images)

A kid casts his hand's shadow as kids play with light in “L'art dans la nature, Dali universe” an open air light show at Parc de la Villette in Paris, France on November 19, 2023. (Photo by Gonzalo Fuentes/Reuters)

Swimmers in the Sky Pool, a transparent swimming pool suspended 35 meters above ground between two apartment buildings, during hot weather in Nine Elms, central London on Monday, August 12, 2024. (Photo by James Manning/PA Images via Getty Images)

Waves batter the North Devon coast at Ilfracombe, UK on August 23, 2024, as Storm Lilian hits the UK and the Met Office issues a yellow weather warning. (Photo by Mark Passmore Photography)