Two men using an electric power saw to fell a tree circa 1940's. (Photo by Keystone View/FPG/Getty Images)

Barneys New York launches Gaga's Workshop with the inflation of the Gaga Spider Balloon at the corner of 23rd and Broadway on November 21, 2011 in New York City. (Photo by Neilson Barnard/Getty Images for Barneys New York)

Council staff clean a section of the rarely seen Minton tiled floor of the of the grand St. George's Hall on January 4, 2012 in Liverpool, England. (Photo by Christopher Furlong/Getty Images)

A freshwater stingray pup looks out from a holding tank at Bristol Zoo's aquarium on January 20, 2012 in Bristol, England. (Photo by Matt Cardy/Getty Images)

Members of the Women's Fire Brigade with their Chief Officer, March 1916. (Photo by Topical Press Agency)

Marina Bay Sands is an integrated resort fronting Marina Bay in Singapore. Developed by Las Vegas Sands, it is billed as the world's most expensive standalone casino property at S$8 billion, including cost of the prime land.

Revellers celebrate New Year's Day in central Moscow, Russia, January 1, 2016. (Photo by Tatyana Makeyeva/Reuters)

Participants take part in a New Year's Jump into the Sea in Portoroz , Slovenia, January 1, 2016. (Photo by Srdjan Zivulovic/Reuters)