A man wears jacket in the colors of Iranian flag as he attends the annual rally commemorating Iran's 1979 Islamic Revolution, in Tehran, Iran, Saturday, February 11, 2023. (Photo by Vahid Salemi/AP Photo)

A photographer has captured these eerie images showing the scale of some of Britain's deepest darkest wonders. Mike Deere, from Reading, heads to daunting locations such as abandoned mine shafts, miles of sewer tunnels that snake underneath London and even disused cooling towers. Photo: This incredible picture was taken at the Box Freestone Mine, in Wiltshire. Mike revealed that even experienced map readers would struggle to navigate their way around the seemingly endless tunnels that he and his friends visit. (Photo by Mike Deere/Caters News)

On the western side of Mount Hood lies the longest glacier cave system in the contiguous United States. In 2012, these caves were mapped to a combined length of 7,166.8 feet by cave explorers Brent McGregor and Eddy Cartaya. Currently, the total passage length is hundreds of feet less. Glaciers are frozen rivers; they are always moving and changing... (Photo and caption by Josh Hydeman)

Dharma the Sumatran tiger yawns as members of the public return to Edinburgh Zoo as it opens for the first time following the easing of Scottish Governments lockdown restrictions on June 29, 2020 in Edinburgh, Scotland. Outdoor visitor attractions in Scotland have reopened along with many non-essential retailers after more than three months in lockdown, as Scotland moves into phase 2 of its “route map” for easing coronavirus restrictions. (Photo by Jeff J. Mitchell/Getty Images)

In this September 4, 1963, file photo, a police officer carries off a demonstrator holding a Confederate flag after a group of demonstrators protested enrollment of two African-Americans at Ramsay High School in Birmingham, Ala. The Confederate battle flag has been removed from South Carolina's Statehouse grounds, in the wake of the massacre of nine African-Americans, including a state senator, at an historic black church in Charleston in June 2015. (Photo by AP Photo)

Nina Bahinskaya, 73, poses for a photo holding an old Belarusian national flag at an entrance of her apartment building in Minsk, Belarus, Thursday, September 10, 2020. The 73-year-old former geologist has become one of the most recognizable faces of Belarus protests, fearlessly waving a huge opposition's red-and-white flag in front of riot police. (Photo by AP Photo/Stringer)

A fisherman throws his net beside a half-submerged M/V Palawan Pearl after it collided with a Cyprus-flagged BKM 104 dredger in Manila bay, Philippines on Thursday, July 8, 2021. A Philippine cargo vessel and a Cyprus-flagged dredger collided in a Manila Bay anchorage area early Thursday, resulting in no injuries but causing the cargo vessel to list and lie half-submerged in the busy waters. (Photo by Aaron Favila/AP Photo)

Shiite Muslim pilgrims march with flags en route to Karbala from Nasiriyah in Iraq's southern Dhi Qar province on September 5, 2022, ahead of the holiday of Arbaeen. (Photo by Asaad Niazi/AFP Photo)