Lights go out on famous monuments around the world to mark Earth Hour

In North America New York's Empire State Building switched off its lights, as did UN headquarters and Canada's Niagara Falls, whilst in South America Rio de Janeiro's iconic Christ the Redeemer statue went dark.

Christ the Redeemer statue stands with its lights turned off during an hour of voluntary darkness for the global "Earth Hour" campaign in Rio de Janeiro, Brazil, March 22 2025 (Christ the Redeemer statue stands with its lights turned off during an hour of voluntary darkness for the global "Earth Hour" campaign in Rio de Janeiro, Brazil, March 22 2025)

In Asia it was the Shanghai Tower, Seoul Tower, Kuala Lumpur's Twin Towers, the Burj Khalifa in Dubai, Taipei's 101 Building, some of Hong Kong's skyscrapers, Bangkok's Temple of Dawn and New Delhi's Indiate Gate that turned off the lights.

Temple of Dawn is seen moments after its lights are turned off for Earth Hour 2025 in Bangkok, Thailand, Saturday, March 22, 2025. (Temple of Dawn is seen moments after its lights are turned off for Earth Hour 2025 in Bangkok, Thailand, Saturday, March 22, 2025.)

In Europe the Castle of Lisbon, the Arc de Triomphe in Paris, parts of St. Peter's Square in the Vatican, the London Eye and The Colosseum in Rome went dark too.

Most lights are out in the European Central Bank during the so-called "Earth Hour" in Frankfurt, Germany, Saturday, March 22, 2025 (Most lights are out in the European Central Bank during the so-called "Earth Hour" in Frankfurt, Germany, Saturday, March 22, 2025)

All of the cities marked it at 2030 local time.

Earth Hour is part of the Worldwide Fund For Nature's annual campaign to draw attention to the climate emergency.

The first Earth Hour was in Sydney, Australia in 2007.

Since then, over 190 countries and territories have taken part.