Visitors walk past "Sculpture #1" by Darren Bader at the Frieze Art Fair in London, Britain October 14, 2015. The Frieze Art Fair, which is one of the world's leading contemporary art fairs, opens today and runs through October 17. (Photo by Suzanne Plunkett/Reuters)

“Supanova Pop Culture Expo (Supanova) is a fan convention focusing on science fiction and fantasy film and TV, comic books, anime, gaming and collectables. It is held annually in the Australian cities of Sydney, Brisbane, Perth and Melbourne”. – Wikipedia

Photo: Terminator and Wolverine pose for photos during the National Cosplay Championships as part of the Supanova Pop Culture Expo at the Dome at Olympic Park on June 19, 2010 in Sydney, Australia. Cosplayers and comic book and sci-fi fans from across the state gathered to meet like-minded folk and attend guest panels with the stars of some of the popular television shows and publications of the genre. (Photo by Sergio Dionisio/Getty Images)

A recruitment drive during the First World War at Trafalgar Square, London. (Photo by Central Press/Getty Images)

A Thorneycroft motor van as used during World War I. (Photo by Topical Press Agency/Getty Images). August 1914

This September 22, 2014 photo, shows a building with street art murals in the Santurce neighborhood in San Juan, Puerto Rico. (Photo by Ricardo Arduengo/AP Photo)

“Hellfest is an annual music festival which takes place in Clisson, France in mid-June. It is held within the Val de Moine sport complex in Clisson, approximately 35 km south-east of the city of Nantes, and approximately 400 km south-west of the nation's capital Paris. Billed as an “extreme music festival”, the programme features a variety of heavy metal, hard rock, punk and hardcore acts”. – Wikipedia. Photo: HellFest 2013. (Photo by Cesar Hernandez)

The contest began in 2007, and since then photographers from more than 70 countries have entered. Photo: Michael O'Neal of San Francisco won first place in the animals category in the 2014 iPhone Photography Awards. (Photo by Michael O'Neal)

The Florida Keys are famous for their diving, but they are less well known for another quirky attraction: the mailboxes residents use to decorate their driveways. From a fiberglass manatee in lipstick to a small white church, Reuters photographer Wolfgang Rattay documented this unusual aspect of local culture as he drove along the Ocean Highway that connects the islands. Photo: A mailbox in the shape of a fire truck is seen along the highway US-1 in the Lower Keys near Marathon in Florida, July 11, 2014. (Photo by Wolfgang Rattay/Reuters)