Stunning silhouettes under European cities reveal the size and splendor of the continent’s urban foundations. Photographer and content-manager Anna Arinova, 28, from Moscow, captured the awe-inspiring labyrinths in Russia and Germany. Here: Regenwurmlager, Poland. The Regenwurmlager is an extensive underground fortification area constructed by Germany in 1920s-1940s, now in western Poland, near the city of Międzyrzecz. (Photo by Anna Arinova/Caters News)

Undated handout photo of Buckbeak, a Hippogriff that lived with Rubeus Hagrid in the Harry Potter series, has his feathers preened and replenished by featherologist Val Jones, as he will feature in the the Feathers and Flight event at Warner Bros. Studio Tour London. This is the first make-over Buckbeak has received since the hugely popular Harry Potter film series was made. His intricate coat is created from thousands of individually airbrushed chicken and goose feathers that Val will carefully clean and replenish in time for the start of Feathers and Flight. Val will lead an expert team to demonstrate the techniques that made winged wonders such as Buckbeak and Fawkes the Phoenix a reality on screen. (Photo by Tim Anderson/PA Wire)

A model poses with “The Wellbeing Toilet” the winning entry from a Dyno-Rod Initiative to create a new design for the domestic toilet at Central Saint Martins on November 18, 2013 in London, England. The concept was commissioned to mark 50 years of Dyno-Rod and World Toilet Day on November 19th, 2013 The “Wellbeing Toilet” looks at the health and wellbeing aspect of getting rid of your bodily waste by being sculpted to enhance the position of your body by enabling you to squat rather than sit. (Photo by Miles Willis/Getty Images for Dyno-Rod)

A museum employee views “Details of Renaissance Paintings (Sandro Botticelli, Birth of Venus, 1482)” by Andy Warhol at the Victoria and Albert museum in London, Britain, March 2, 2016. The piece forms part of “Botticelli Reimagined”, an exhibition exploring the ways artists have responded to the artistic legacy of the fifteenth century artist Sandro Botticelli, and including over fifty artworks by Botticelli himself. (Photo by Toby Melville/Reuters)

A woman adjusts the Mantle of the Order of the British Empire at an exhibition at Buckingham Palace in London, Thursday, July 21, 2016. In celebration of Her Majesty's 90th birthday this year, visitors to the Summer Opening of the State Rooms at Buckingham Palace will enjoy an unprecedented display of The Queen's outfits, from childhood to the present day, in the special exhibition Fashioning a Reign: 90 Years of Style from The Queen's Wardrobe. (Photo by Frank Augstein/AP Photo)

Revellers dance at Notting Hill Carnival on August 29, 2016 in London, England. The Notting Hill Carnival, which has taken place annually since 1964, is expected to attract over a million people. The two-day event, started by members of the Afro-Caribbean community, sees costumed performers take to the streets in a parade and dozens of sound systems set up around the Notting Hill streets. (Photo by Jack Taylor/Getty Images)

Children sit under a crocodile based table, as they pose for photographers during a press preview of a themed auction that features the animal as artistic inspiration, entitled “Creatures Great and Small”, in London, Monday, December 15, 2014. The sale scheduled for December 17, 2014, explores animals across a diverse range of mediums and styles, from intricate carving details in 19th century furniture through to contemporary sculpture, according to Christie’s auction house. (Photo by Lefteris Pitarakis/AP Photo)

File photo dated 21/04/66 of Pattie Boyd in London's West End wearing a mini skirt, as the British designer Mary Quant, widely credited with popularising the mini skirt has recalled its “feeling of freedom and liberation” 50 years after she took the fashion world by storm. Quant, who named the skirt after her favourite make of car, said she “couldn't have imagined” in 1964 that it would become a staple of women's clothing, but added: “It seemed then to be obvious, and so right”. (Photo by PA Wire)