Urban photographer Roman Robroek spent five years scouring the continent for the grandest examples of forgotten architectural beauty. Here: Watch your step on this Polish spiral staircase. (Photo by Roman Robroek/South West News Service)

German field telegraph operators at work in Warsaw. (Photo by Hulton Archive/Getty Images). 1st October 1914

Dancers wait in the wings before performing in a full-dress rehearsal at the Moulin Rouge in Paris on September 8, 2021, two days ahead of the reopening of the cabaret following an 18-month closure amid the COVID-19 pandemic. Closed for a year and a half due to the pandemic, the Moulin Rouge and Le Lido, emblems of the crazy Parisian nights since 1889, are finally reopening. (Photo by Christophe Archambault/AFP Photo)

A navy diver storms into the gallery during a military display at Singapore's 52nd National Day celebrations at Marina Bay in Singapore August 9, 2017. (Photo by Edgar Su/Reuters)

A Filipino devotee is carried by police officers outside the Quiapo church after she fainted during the Black Nazarene feast day in Manila, Philippines, January 9, 2020. (Photo by Willy Kurniawan/Reuters)

Manchester City's English midfielder Kalvin Phillips (C) pours alcohol in the mouth of Manchester City's English midfielder Jack Grealish (L) as they celebrate on stage following an open-top bus victory parade for their European Cup, FA Cup and Premier League victories, in Manchester, northern England on June 12, 2023. (Photo by Oli Scarff/AFP Photo)

People enjoy their time near the Arcadia stage at the Glastonbury Festival site in Somerset, Britain on June 24, 2023. (Photo by Jason Cairnduff/Reuters)

An air tanker flies low over a wildfire burning on the edge of the Cariboo region city of Williams Lake, British Columbia, Canada on July 21, 2024. (Photo by Spencer Stratton/Handout via Reuters)