A visitor takes in a view of the downtown district from Twin Peaks on Friday, January 9, 2015, in San Francisco. (Photo by Marcio Jose Sanchez/AP Photo)
A woman takes a selfie in front of a Lunar New Year display featuring sheep at a shopping mall in Hong Kong, February 13, 2015. (Photo by Bobby Yip/Reuters)
A child dressed as a clown takes part in the celebration of the Virgen de los Desamparados, or Our Lady of the Abandoned, at Diria town, Nicaragua May 14, 2016. (Photo by Oswaldo Rivas/Reuters)
People take a selfie with a sawdust and flower carpet during the feast of Corpus Christi in downtown Trujillo, Peru, May 26, 2016. (Photo by Mariana Bazo/Reuters)
Participants dressed in ancient Japanese costumes take part in a parade at the Imperial Palace during the Sanno Festival in Tokyo, Japan June 10, 2016. (Photo by Toru Hanai/Reuters)
A Hindu devotee displays his inked hand after taking part in the religious festival of Holi in Vrindavan, in the northern state of Uttar Pradesh, India, March 8, 2017. (Photo by Cathal McNaughton/Reuters)
Taking it all in at Trolltunga, a piece of rock which juts horizontally out of a mountain, 700 metres above lake Ringedalsvatnet in Norway. (Photo by Sam Rogers/GuardianWitness)
A model takes selfie with mobile phone as she presents a creation from the Dolce & Gabbana Spring/Summer 2016 collection during Milan Fashion Week in Italy, September 27, 2015. (Photo by Stefano Rellandini/Reuters)