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)

A model holds a dog presenting a creation by Anthony Rubio during New York Fashion Week, in New York City, U.S., September 13, 2025. (Photo by Caitlin Ochs/Reuters)

Children attend a war safety awareness class conducted by civil defence members, in the rebel-controlled area of Maaret al-Numan town in Idlib province, Syria May 14, 2016. (Photo by Khalil Ashawi/Reuters)

A woman dressed in a cheongsam interacts gracefully with vibrant fish lanterns at Kwai Chai Hong, a heritage revival alley in Chinatown, on January 09, 2025, in Kuala Lumpur, Malaysia. Kwai Chai Hong celebrates the Lunar New Year with an immersive art installation titled Bountiful Blessings, inspired by the idiom “Nian Nian You Yu”, which translates to “Wishing an Abundance Year After Year”, blending traditional fish lanterns with modern lights to inspire abundance and prosperity, inviting visitors to embark on a cultural journey of generosity and abundance for future generations. (Photo by Annice Lyn/Getty Images)

Sunrise in Ely, Cambridgeshire on April 15, 2020 by the River Great Ouse, England. The warm weather is set to continue until the weekend. (Photo by Veronica Johansson Poultney/Bav Media)

Portuguese police detains a woman that was protesting against the demonstration against “uncontrolled immigration” called by Portuguese far-right party Chega in Lisbon on September 29, 2024. (Photo by Patrícia de Melo Moreira/AFP Photo)

Palestinians sit in a fishing boat loaded into a horse cart as they pass on a street in the northern Gaza Strip on October 19, 2022. (Photo by Suhaib Salem/Reuters)

“The Personal Urban Mobility and Accessibility (PUMA) is an experimental electrically powered road vehicle created by Segway and adopted by General Motors as a concept vehicle representing the future of urban transportation. It operates on two wheels placed side-by-side, a layout that differs in placement from motorcycles which instead have their two wheels placed at the front and rear”. – Wikipedia

The Project P.U.M.A. (Personal Urban Mobility and Accessibility) prototype is displayed for the media April 7, 2009 in New York City. (Photo by Mario Tama/Getty Images)