A toilet block is surrounded by white sand in the White Sands National Monument park area near Alamogordo, New Mexico, United States, October 6, 2015. The park's white sand dunes are composed of gypsum crystals. It is the largest gypsum dune field in the world. Some 2.4 billion people around the world don't have access to decent sanitation and more than a billion are forced to defecate in the open, risking disease and other dangers, according to the United Nations. The UN says that while there is sufficient fresh water on the planet for everyone, "bad economics and poor infrastructure" mean that every year millions of people - most of them children - die from diseases linked to poor sanitation, unhygienic living conditions and lack of clean water supplies. To mark World Toilet Day on November 19, Reuters photographers captured pictures of toilets in cities, towns and villages around the globe. REUTERS/Shannon Stapleton PICTURE 1 OF 45 FOR WIDER IMAGE STORY: "AROUND THE WORLD IN 45 TOILETS". SEARCH "REUTERS OUTHOUSE" FOR ALL IMAGES.