A couple photograph The Helmsley Building on Park Avenue, lit in honor of the victims of the Nice attacks, in Manhattan, New York, U.S., July 15, 2016. (Photo by Brendan McDermid/Reuters)
Participants wearing Zentai costumes, or skin-tight bodysuits from head to toe, take part in a march down the shopping district of Orchard Road during Zentai Art Festival in Singapore May 23, 2015. Close to 50 participants strutted down the busy shopping district during the Zentai art festival which is jointly organized by the Japanese embassy. The festival includes performances and discussions on Zentai from May 22 to from June 5. (Photo by Edgar Su/Reuters)
A picture made available on 09 September 2015 shows traditional mud men dancers from the Asaro District of Goroka in the Eastern Highlands Province of Papua New Guinea perform for the official opening of the Pacific Islands Forum in Port Moresby, Papua New Guinea, 08 September 2015. The Pacific Islands Forum goes from 07 to 11 September and discusses the regions vulnerability to Climate Change. (Photo by Mick Tsikas/EPA)
German film actress Lilly Krug, daughter of Veronica Ferres and Martin Krug, attends the screening of “Armageddon Time” during the 75th annual Cannes film festival at Palais des Festivals on May 19, 2022 in Cannes, France. (Photo by Piroschka Van De Wouw/Reuters)
A zoo keeper holds a month old striped Hyena cub called Hachi at the Bali zoo in Giayar, Bali Indonesia on Saturday, February 6, 2021. (Photo by Firdia Lisnawati/AP Photo)
Santa Claus reacts as (L) Tami McEleney and (R) Patrice Conner whisper in his ear at the King of Prussia Mall, United States' largest retail shopping space, in King of Prussia, Pennsylvania, U.S., December 8, 2018. (Photo by Mark Makela/Reuters)
Cave of the Crystals or Giant Crystal Cave is a cave connected to the Naica Mine 300 metres (980 ft) below the surface in Naica, Chihuahua, Mexico. The main chamber contains giant selenite crystals (gypsum, CaSO4·2 H2O), some of the largest natural crystals ever found. The cave's largest crystal found to date is 12 m (39 ft) in length, 4 m (13 ft) in diameter and 55 tons in weight. The cave is extremely hot with air temperatures reaching up to 58 °C (136 °F) with 90 to 99 percent humidity. The cave is relatively unexplored due to these factors. Without proper protection people can only endure approximately ten minutes of exposure at a time.