Women in costumes walk as they participate in Halloween celebrations in the downtown of Seoul, South Korea, October 31, 2015. (Photo by Kim Hong-Ji/Reuters)

The Photographers 2015 runs from 25 November to 23 December at Osborne Samuel and Beetles+Huxley, London. Here: Untitled, 1950, by Bert Hardy. (Photo by Bert Hardy/Beetles+Huxley & Osborne Samuel)

A period of relative stability has put the Iranian capital No1 on the list of world cities that have achieved biggest improvements in liveability over the past five years, as calculated by the Economist Intelligence Unit. The “most improved” top 10 contains some unexpected names. So, eg, the fourth place: Abidjan, Ivory Coast. Latest ranking: 128; Ranking five years ago: 131; Five-year index movement: 3.8%. Here: A supporter of Ivory Coast president Alassane Ouattara campaigns in a market in the city’s Koumassi quarter. (Photo by Sia Kambou/AFP Photo)

A tourist stands on the shore of a private beach in Naama Bay, Sharm el-Sheikh, south Sinai, Egypt, Sunday, November 8, 2015. Britain's foreign secretary says airport security in many cities will need to be overhauled if it is confirmed the Russian plane crash in the Sinai was caused by a bomb planted by the Islamic State group or someone inspired by the militants. (Photo by Vinciane Jacquet/AP Photo)

Over the years a large population of grey herons have made an unlikely home in urban Amsterdam. Julie Hrudova documents how the birds integrate into city life. Here: Hundreds of herons come to the city during winter to find food and shelter. (Photo by by Julie Hrudova/The Guardian)

A painter was drawing a lion head body painting on a model during the auto show on March 15, 2015. The local 2015 auto show was held in Xuchang Stadium in Xuchang, Henan Province, China. The exhibitors tried a variety of ways for promotion and attracting people's attention. Some exhibitors were giving gifts to the people scanning their QR codes and add them onto friends list. An auto company has invited young s*x underwear models and drew body paintings on the girls. (Photo by Xu Zhongxin/Sipa Asia)

A pigeon rests on a wild iguana in a tree inside Seminario Park in Guayaquil, Ecuador, Thursday, April 3, 2014. Pigeons coexist with the wild iguanas at this park in the middle of the city surrounded by savannah. (Photo by Dolores Ochoa/AP Photo)

“Beryl Cook, (10 September 1926 – 28 May 2008) was an English artist best known for her original and instantly recognisable paintings of people enjoying themselves in pubs,girls shopping or out on a hen night. Drag shows or a family picnicing by the seaside or abroad – tangoing in Buenos Aires or gambling in Las Vegas. She had no formal training and did not take up painting until middle age”. – Wikipedia. Photo: “Ladies Night”, 1991. Artwork by Beryl Cook.