South Koreans wear Santa Claus outfits and hold gifts to promote Christmas at a charity event on December 23, 2011 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images)

Sunday night, Lauren Watts searches for her dog in Mayflower, Arkansas., after a tornado struck the town. (Photo by Benjamin Krain/The Arkansas Democrat-Gazette)

A U.S. Marine leads training on a shooting range in France in an undated photo taken during the First World War. (Photo by Reuters/Courtesy Library of Congress)

People cross the street in central Pyongyang, North Korea May 4, 2016. (Photo by Damir Sagolj/Reuters)

Women playing in the street as the snow falls on Johannesburg for the first time in seventeen years. (Photo by Keystone/Getty Images). 1st September 1962

Tennis star Anna Kournikova of Russia recreates a legendary Marilyn Monroe pose during the filming of the adidas climacool commercial on location in Los Angeles. (Photo by CLIVE BRUNSKILL/Getty Images). 11 Mar. 2002

In the middle of the lobby of the Radisson SAS Hotel in Berlin stands a AquaDom standing 25 meters tall and is the largest cylindrical aquarium ever built. It’s filled with about 900,000 liters of seawater and has 2600 fish of 56 species.