Russia Northenmost City

An aerial view of the chimneys of the heat and power plant in Norilsk, Russia, Tuesday, November 7, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

An aerial view of the chimneys of the heat and power plant in Norilsk, Russia, Tuesday, November 7, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

in Norilsk, Russia, Tuesday, November 7, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

in Norilsk, Russia, Wednesday, November 8, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Kids ski in Norilsk, Russia, Saturday, November 4, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Kids ski in Norilsk, Russia, Saturday, November 4, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

A man stands as he looks at the sun with the distance pole showing distance to nearby cities in Norilsk, Russia, Saturday, November 4, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

People listen to the rock band at the Zaboi (The Face) bar in Norilsk, Russia, Saturday, November 4, 2017. The bar is the only one in the city that has own brewery. (Photo Sergey Ponomarev)

Russia Northenmost City

Children practice singing as they prepare to attend folklore festival at the local religious school in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Children dressed in Russian traditional costumes attend folklore festival at the local religious school in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev for The New York Times)

Russia Northenmost City

Children dressed in Russian traditional costumes attend folklore festival at the local religious school in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Children and youth waiting for their turn to attend folklore festival at the local religious school in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

A woman enjoys snow bathing at the winter swimming club in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

A man walks in the icy water at the winter swimming club in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

People walk in the icy water at the winter swimming club in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

People walk in the icy water at the winter swimming club in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

A man seen in the icy water at the winter swimming club, Walruses of Taimyr in Norilsk, Russia, Sunday, November 5, 2017. The lake on the outskirts of the city, is called Dolgoye and is used to store and cool water from local power plant and other production facilities. (Photo Sergey Ponomarev)

Russia Northenmost City

Woman exercises at the at the winter swimming club, Walruses of Taimyr in Norilsk, Russia, Sunday, November 5, 2017. The lake on the outskirts of the city, is called Dolgoye and is used to store and cool water from local power plant and other production facilities. (Photo Sergey Ponomarev)

Russia Northenmost City

Kids enjoy sliding on ice in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Kids enjoy sliding on ice in Norilsk, Russia, Sunday, November 5, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Plant workers seen in the bus that will take them to the city in Norilsk, Russia, Wednesday, November 8, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

Plant workers seen in the bus that will take them to the city in Norilsk, Russia, Wednesday, November 8, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

People seen walking on the streets of Dudinka, Russia, Thursday, November 9, 2017. (Photo Sergey Ponomarev)

Russia Northenmost City

People seen walking on the streets of Dudinka, Russia, Thursday, November 9, 2017. Dudinka is a small port city on the Yenisei river and it is main transportation hub for production of Norilsk factories. (Photo Sergey Ponomarev for)