More than 3,000 landmarks across the globe from the Eiffel Tower to the Empire State Building and United Nations headquarters in New York all the way to the Acropolis in Greece, switched off their lights Saturday night for Earth Hour.

Earth Hour is marked around the world with millions expected to turn off lights for 60 minutes to raise awareness for climate change.

2017 marked the tenth anniversary and the biggest Earth Hour event to date. According to Earth Hour, it is the world’s largest grassroots movement for the environment.

“Each light turned off or profile picture changed represents an individual who has made the switch from being a passive bystander to someone eager to be a part of the solution...” said Sid Das, Executive Director, Earth Hour Global.

A globe illuminated with led-lights by activists of the World Wide Fund For Nature (WWF) in front of the Brandenburg Gate to mark Earth Hour, in Berlin, Saturday, March 25, 2017. (AP Photo/Markus Schreiber)

In this combo picture, a view of Malaysia's landmark Petronas Twin Towers is seen before (above) and during lights out (below) for Earth Hour in Kuala Lumpur, Malaysia on Saturday, March 25, 2017. (AP Photo/Daniel Chan)

In this two photo combination picture, the The Kremlin is illuminated before the lights were turned off, top, and then the same location in darkness when the lights are turned off for one hour to mark Earth Hour in Moscow, Russia, Saturday, March 25, 2017. (AP Photo/Denis Tyrin)

In this two photo combo, the temple of the Parthenon on the Acropolis hill, is seen before the lights were turned out, below, and during the Earth Hour with lights turned off, above, in Athens, on Saturday, March 25, 2017. (AP Photo/Yorgos Karahalis)

In this two photo combo, the Brandenburg Gate is seen shortly before the lights were turned out, above, and during the Earth Hour with lights turned off, below, in Berlin, Saturday, March 25, 2017. (AP Photo/Markus Schreiber)

In this two photo combination picture, Moscow's city skyscrapers are illuminated before the lights were turned off, top, and then the same location in darkness when the lights are turned out for one hour to mark Earth Hour in Moscow, Russia, Saturday, March 25, 2017. (AP Photo/Denis Tyrin)

In this two photo combination picture, The Kremlin's Towers and a church are illuminated before the lights were turned off, top, and then the same location in darkness when the lights are turned out for one hour to mark Earth Hour in Moscow, Russia, Saturday, March 25, 2017. (AP Photo/Denis Tyrin)

People hold illuminated balloons as they gather to mark the Earth Hour in Madrid, Saturday, March 25, 2017. The lights of main buildings of the Spanish capital such as the Opera House (background), the Royal Palace or La Almudena cathedral were switched off during an hour. (AP Photo/ Francisco Seco)

Buddhist monks light oil lamps during earth hour celebrations at Myanmar's famous Shwedagon pagoda, Saturday, March 25, 2017, in Yangon, Myanmar. Volunteers took part in earth hour celebrations organised by World Wide Fund for Nature (WWF-Myanmar) for the first time in the country. (AP Photo/Thein Zaw)