In this November 30, 2017 photo, Douglas scoops up mud from the bottom of the polluted Guaire River, in search of gold and anything valuable he can sell, in Caracas, Venezuela. Some stretches of the river smell of sewer while others emit a toxic odor of fuel, a stench that stays in ones nose for hours after leaving the water. (Photo by Ariana Cubillos/AP Photo)

A Naga sadhu, or naked Hindu holy man, poses for a picture after taking a holy dip in the Godavari River during Kumbh Mela, or Pitcher Festival, at Trimbakeshwar in Nasik, India, Sunday, September 13, 2015. Hindus believe taking a dip in the waters of a holy river during the festival, will cleanse them of their sins. According to Hindu mythology, the Kumbh Mela celebrates the victory of gods over demons in a furious battle over a nectar that would give them immortality. (Photo by Rafiq Maqbool/AP Photo)

Believers bathe in the icy water during a traditional Epiphany at the Church of the Holy Trinity in Ostankino near TV Tower in Moscow, Russia, Wednesday, January 18, 2023. Across Russia, the devout and the daring are observing the Orthodox Christian feast day of Epiphany by immersing themselves in frigid water through holes cut through the ice of lakes and rivers. Epiphany celebrates the revelation of Jesus Christ as the incarnation of God through his baptism in the River Jordan. (Photo by Alexander Zemlianichenko/AP Photo)

A woman in a wedding dress walks on the dried-up riverbed of the Jialing river, a tributary of the Yangtze, that is approaching record-low water levels in Chongqing, China on August 18, 2022. (Photo by Thomas Peter/Reuters)

A curious trio of owl monkeys peep out of a tree hollow on the Marañón River near the city of Nauta, Peru in April 2024. (Photo by James Cai/Solent News)

A man rides a bicycle by a graffiti under the “Old Sava bridge” over Sava river in Belgrade, Serbia, Wednesday, May 19, 2021. (Photo by Darko Vojinovic/AP Photo)

A male stag beetle walks on a branch in an oak forest near the Spree River in Kersdorf, Brandenburg, Germany, on June 8, 2025. (Photo by Patrick Pleul/picture alliance via Getty Images)

Decaying fishing trawlers known collectively as The Fleetwood Wrecks, are seen at low tide on the banks of the River Wyre in Fleetwood, Britain on September 26, 2023. (Photo by Lee Smith/Reuters)