The Acura Stage area is flooded after a storm dumped several inches of rain on the second Saturday of the New Orleans Jazz Fest at the Fair Grounds, Saturday, April 30, 2016. (Photo by David Grunfeld/NOLA.com/The Times-Picayune via AP Photo)

Actors Jason Statham and Rosie Huntington-Whiteley arrive at the Metropolitan Museum of Art Costume Institute Gala (Met Gala) to celebrate the opening of “Manus x Machina: Fashion in an Age of Technology” in the Manhattan borough of New York, May 2, 2016. (Photo by Lucas Jackson/Reuters)

Emily Ratajkowski arrives at The Metropolitan Museum of Art Costume Institute Benefit Gala, celebrating the opening of “Manus x Machina: Fashion in an Age of Technology” on Monday, May 2, 2016, in New York. (Photo by Charles Sykes/Invision/AP Photo)

Meet Claire, the 3-year-old bull terrier travels the world with Dutch photographer Alice van Kempen, 48, and poses for photographs in abandoned buildings. Van Kempen seeks out abandoned places to photograph in pursuit of her passion for urban exploring, bringing along her globetrotting pooch as her trusted companion. Here: Claire plaiyng the piano in an abandoned Cafe in Luxembourg. (Photo by Alice van Kempen/Caters News)

The North Side Skull & Bone Gang stand together during the wake up call for Mardi Gras, Tuesday, February 9, 2016, in New Orleans. Their costumes are intended to represent the dead and they bring a serious message, reminding people of their mortality and the need to live a productive and good life. (Photo by Brynn Anderson/AP Photo)

Gigi Gorgeous presents a creation during the American Heart Association's (AHA) Go Red For Women Red Dress Collection, presented by Macy's at New York Fashion Week February 11, 2016. (Photo by Andrew Kelly/Reuters)

Ethnic Miao men wearing traditional masks smear dust on a woman's face to wish her good luck during local celebration event for Lunar New Year in Liuzhou, Guangxi Zhuang Autonomous Region, China, February 16, 2016. (Photo by Reuters/Stringer)

It is already one of the world’s most iconic cities, but this incredible collection shows how much Paris has changed over the course of the past century. The collection, by French photographer Julien Knez, shows Paris in the 1940s against a backdrop of how the same places look today. Knez says he put the striking collection together to celebrate the 71st anniversary of the city’s liberation from Nazi control in August 1944. Here: Soldiers outside the Hotel De Ville in the 1940s. (Photo by Julien Knez/Caters News)