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)

These spectacular pictures show the incredible moment a rare natural phenomenon happens in the night sky. Red sprite lightning lasts only a millisecond and takes place high above a tunderstorm cloud.The breathtaking flashes of light are caused by huge electrical discharges of lightning in the sky. Marko Korosec, 32, was lucky enough to catch these sprites on camera after months of trying. Mr Korosec, from Sezana in Slovenia, took the shots whilst he was following storms in Vivaro, Italy. (Photo by Marko Korosec/Solent News/SIPA Press)

Model, skydiver and wing-suit jumper Roberta Mancino, 33, swims with a whale shark on February 2014 in Isla Mujeres, Mexico. A female skydiver swims with whale sharks, manta rays and sailfish – the fastest fish in the sea. Model, skydiver and wing-suit jumper Roberta Mancino, 33, jumped from a boat into the ocean surrounding Isla Mujeres near the northern Peninsula of Mexico. The incredible project involved two trips to the stormy winter seas – one in February 2013 and one a year later in February 2014. (Photo by Shawn Heinrichs/Barcroft Media)

Archie, a Chinese Crested dog, sits with his tongue out before the start of the 20th Annual Ugliest Dog Competition at the Sonoma-Marin Fair June 20, 2008 in Petaluma, California. Owners of ugly dogs travel to Petaluma from all over the country to participate in the annual contest. (Photo by Justin Sullivan/Getty Images)

A craftsman makes imitation bread samples at The Sample Factory on February 25, 2008 in Gujo, Gifu, Japan. Gujo City has more than a 50 percent share of the imitation vinyl chloride samples industry. Replica foods are used in most restaurant window displays in Japan, and are popular as souvenirs for tourists. (Photo by Koichi Kamoshida/Getty Images)

Fishermen slaughter a 9.61m Baird's Beaked whale at Wada Port on June 28, 2008 in Minami Boso, Chiba, Japan. Only five ports are allowed whaling under the coastal whaling program which tries to keep whaling tradition that dates back to the seventeenth century. Japan is only allowed to hunt a limited number of whales every year. (Photo by Koichi Kamoshida/Getty Images)

A statue of The Earl of Beaconsfield looks on as a giant mechanical spider sits on the side of the derelict Concourse tower in Liverpool city centre on September 3, 2008 in Liverpool, England. The 50ft tall spider was commissioned for the city's European Capital of Culture year and will begin moving to explore the city operated by artists from French theatre company La Machine. (Photo by Christopher Furlong/Getty Images)

“The World Stands on its Head” (“Die Welt Steht Kopf”) House on the Baltic Sea Island of Usedom stands nearly completed on September 3, 2008 in Trassenheide, Germany. The upside down house, complete with upside down interior furnishings, is the brainchild of Klaudiusz Golos and Sebastian Mikiciuk, and will become a local tourist attraction. (Photo by Sean Gallup/Getty Images)