Cave Diver, Anhumas Abyss, Bonito, Brazil: The Anhumas Abyss is an underground cavern with a crystal-clear lake below, more than 260 feet (79 m) deep. A visitor must enter through a narrow opening at the top of the chamber and rappel into the cave. Snorkeling and scuba diving in the lake reveal amazing scenery. Distinctive, conical limestone stalagmites and stalactites occupy the lake and the surrounding area, some reaching 65 feet (20 m) high. (Photo by Marcio Cabral/Nature’s Best Photography Awards 2017)

Sport category, winner: Yuan Peng. Liu Bingqing and Liu Yujie are twin sisters who have studied and trained in gymnastics since their early childhood in Jining, China. (Photo by Yuan Peng/Sony World Photography Awards)

Participants in the Miss Pole Dance South America 2013 competition pose in front of the obelisk in Republica Square in downtown Buenos Aires on November 22, 2013 ahead of the contest to be held on November 23 and 25 in the city. (Photo by Juan Mabromata/AFP Photo)

Palestinian Anoush Belian poses on stage during a bodybuilding competition in Tel Aviv, Israel August 22, 2015. Belian, from Jerusalem, on Saturday became the first Palestinian female bodybuilder to participate and win an Israeli competition. Belian won the Miss Fitness category in the competition organised by the National Amateur Bodybuilders Association (NABBA) in Israel. (Photo by Ammar Awad/Reuters)

Miss World 2013, Megan Young of the Philippines, poses during a publicity launch near to Big Ben and the Houses of Parliament in central London November 25, 2014. The final of the 2014 edition of the pageant will take place in London on December 14. (Photo by Toby Melville/Reuters)

In this September 10, 2016 picture, a girl takes pictures of a fellow contestant while warming up backstage before competing in the Romania Miss Pole Dance Contest, ahead of the finals of the Pole Sport&Fitness World Championship 2016 in Bucharest, Romania. (Photo by Vadim Ghirda/AP Photo)

In this Sunday, May 22, 2016 photo, contestants in the first Miss Trans Israel beauty pageant gather for rehearsal in Tel Aviv, Israel. The pageant will be held at HaBima, Israel's national theater, in Tel Aviv on Friday. Tel Aviv has emerged as one of the world's most LGBT-friendly travel destinations, standing in sharp contrast to most of the rest of the Middle East, where gays can face persecution. (Photo by Oded Balilty/AP Photo)

Winner. “I took this vertical image in the Quarry Bay district of Hong Kong during the dusk ‘blue hour’, when there was a perfect balance between the ambient light in the sky and the artificial lights of the high-rise residential buildings”. (Photo by Jatinder Heer/The Guardian)