Watch: Famous landmarks around the world power down for Earth Hour.

Earth Hour is an annual event that encourages individuals and businesses around the world to switch off their lights for one hour to raise awareness about climate change and promote sustainability. This year, famous landmarks from all over the globe participated in Earth Hour by powering down their lights. During Earth Hour, which took place on March 27, iconic landmarks such as the Eiffel Tower in Paris, the Sydney Opera House in Australia, and the Empire State Building in New York City, among many others, turned off their lights to show their commitment to fighting climate change. The event is organized by the World Wide Fund for Nature (WWF) and has been taking place since 2007. The Eiffel Tower, one of the most recognizable landmarks in the world, went dark for Earth Hour. The Tower, which is usually lit up with thousands of sparkling lights, stood tall and dark for one hour to bring attention to the urgent need for climate action. The symbolic gesture sent a powerful message to people all over the world, reminding them of the importance of preserving the environment. In Australia, the Sydney Opera House turned off its lights, giving the iconic building a unique appearance against the dark night sky. The Opera House, known for its stunning architecture and vibrant light shows, joined millions of people from around the world in the global movement to protect our planet. The moment was captured by photographers and shared on social media, inspiring others to take action as well. In the United States, the Empire State Building in New