A man arranges a display of cacti during preparations for the RHS Chelsea Flower Show in London, Britain May 21, 2016. (Photo by Neil Hall/Reuters)

Beneath the Swedish capital lies an intricate web of underground train lines. More than 90 of the 100 stations in the 110km tunnel system, sometimes referred to as “the world’s longest art gallery”, have been decorated with paintings, installations, mosaics and sculptures by 150 artists since the 1950s. After spending a couple of weeks exploring arctic Norway and Sweden, London-based travel photographer Conor MacNeill headed underground to capture images of the metro stations. Here: A rainbow arcs over a girl on the platform of Stadion station. (Photo by Conor MacNeill/The Observer)

A priest sprinkles holy water on a believer during the Orthodox Easter service in the Holy Transfiguration Cathedral in the rebel-controlled city of Donetsk, Ukraine on May 2, 2021. (Photo by Alexander Ermochenko/Reuters)

Residents recently returning to their area cleared by government troops react as they ride a tricycle a day after President Rodrigo Duterte declared the liberation of Marawi city in southern Philippines Wednesday, October 18, 2017. Sporadic explosions continue Wednesday as Philippine soldiers fought to gain control of the last pocket of Marawi controlled by Islamic militants. (Photo by Bullit Marquez/AP Photo)

Women dance at the Taiga nightclub in Batroun village, north of Beirut, Lebanon, Friday, July 2, 2021. With their dollars trapped in the bank, a lack of functioning credit cards and travel restrictions imposed because of the pandemic, many Lebanese who traditionally vacationed over the summer at regional hotspots are also now turning toward domestic tourism. (Photo by Hassan Ammar/AP Photo)

“A team of expert cavers and photographers had been exploring caves in the Chongquing province of China – when they were amazed to discover the entrance to a hidden cave that was previously undiscovered. And they were stunned when they managed to enter the ginormous cave – and found that it was so large there was even a cloud inside it – a cave so large it has its own weather system. Photographer and caver Robbie Shone, from Manchester, was part of a team of 15 explorers on a month-long expedition who stumbled across the natural wonder”. – Caters News

A worker roasts a row of pigs on bamboo poles at a roasting pit, in Manila, Philippines, December 21, 2020. (Photo by Lisa Marie David/Reuters)

A young cholita from “Warmi Empollerada” project is portrayed emulating to fly with an umbrella during the sunset at the Salar de Uyuni (Uyuni Salt Flats), southwestern Bolivia, on June 25, 2023. The Salar de Uyuni is the world's largest salt flat and a top tourist destination in Bolivia and South America. (Photo by Marcelo Perez Del Carpio/Anadolu Agency via Getty Images)