At the dead of night, the photographer – known to his Instagram followers as Dark Cyanide – heads out to look for hidden gems, like abandoned stations, provisions and tunnels. His intriguing images feature vibrant streaks, graffiti, and tight framing – and by adding individuals to some to some of shots, he is also able to depict the incredible scale of some of the tunnels. Here: Unnamed subway track in New York City. (Photo by Dark Cyanide/Caters News)

Chinese paramilitary guards monitoring passengers as they head to their train to travel to their hometowns for the “Spring Festival” or Lunar New Year at Nantong Railway Station in Jiangsu province, near Shanghai Travellers taking part in the world' s largest annual human migration must be home by January 27 to usher in the new year on January 28. (Photo by AFP Photo/Stringer)

Heads of love dolls are seen on the shelf on March 9, 2017 in Tokyo, Japan. Japan's oldest and largest “love doll” maker Orient Industry, has been producing silicone love dolls since 1977, and has seen there is a trend for intimate relationships with silicone dolls in Japan. (Photo by Taro Karibe/Getty Images)

A long-tailed monkey, wearing jeans and a doll's head perform on the streets of Boyolali, Central Java Indonesia. Primates are used by owners to beg at crossroads, the primate show can earn $ 5 per day. Begging using long-tailed monkeys is opposed by animal lovers community as it is considered to torture and degrade animal health. (Photo by Arief Setiadi/Pacific Press/Barcroft Images)

Dutch driver Hans Jos Liefhebber on his KTM drives next to a seal during the fifth stage of the 2018 Dakar Rally, between San Juan de Marcona and Arequipa, on the beach of Puerto Lomas, Peru, 10 January 2018. The 2018 Dakar says goodbye to the dunes with its fifth and final stage over the Peruvian desert and begins to take height as it enters the Andean mountain range, heading for Bolivia. (Photo by David Fernandez/EPA/EFE)

Azat Shajbyrov reacts with a baby falcon on his head in a village of Bokonbaevo, Issyk-Kul area (270 km from Bishkek), Kyrgyzstan, 22 June 2016, as he dreams of continuing a family tradition of golden eagle hunting. Eagle and falcon hunting is an old Kyrgyz tradition. With their birds, Kyrgyz berkutchy hunt in the mountains and participate in the hunting festival “Salburun”. (Photo by Igor Kovalenko/EPA)

A Maasai warrior makes the high jump, in which athletes must touch a high line with the top of their heads, at the annual Maasai Olympics in the Sidai Oleng Wildlife Sanctuary near to Mt. Kilimanjaro, in southern Kenya, Saturday, December 13, 2014. Maasai men and women from the Amboseli and Tsavo region compete for medals and prizes in the event which aims for a sports competition of Maasai skills such as running, jumping, and throwing, to replace lion-hunting as the traditional warrior activity. (Photo by Ben Curtis/AP Photo)

Migrants with a stick, stones and knife fight with each other after a brawl erupted over a place in an overcrowded train heading to the Serbian border at the train station in Gevgelija, The Former Yugoslav Republic of Macedonia, 14 August 2015. (Photo by Georgi Licovski/EPA/EFE)