PHOTOS: World turns blue for UN's 70th anniversary

Landmarks and iconic buildings including the Sydney Opera House, Mumbai’s Chatrapati Shivaji Centre to the Leaning Tower of Pisa in Italy have been bathed in bright blue light to celebrate the 70th anniversary of the United Nations and commemorate UN Day.

More than 300 monuments, landscapes, museums, bridges and other landmarks across more than 75 countries were lit up in the official colour of the United Nations.

The iconic CST station in Mumbai was one of the structures that was lit in blue light for the event. Photograph: Dhiraj Singh/United Nations Information Centres

The Sydney Opera House was one of the first buildings to light up the sky. Photograph: Jason Reed/Reuters

Tokyo Skytree is lit up in blue, the symbol colour of the United Nations to honour the 70th anniversary of its founding in Tokyo. Photograph: Kyodo/Reuters

Hotel ‘Kazakhstan’ is lit up in blue to honour the 70th anniversary of the United Nations in Almaty. Photograph: Shamil Zhumatov/Reuters

Students form the UN sign at a rally to honour the 70th anniversary of the United Nations in Almaty, Kazakhstan. “I am grateful our member states are showing such strong enthusiasm in marking 70 years of UN support for peace, development and human rights,” UN secretary-general Ban Ki-moon said. Photograph: Li Sanxian/Reuters

The United Nations headquarters in New York is washed in blue light. Photograph: Lucas Jackson/Reuters

The Great Wall of China is lit up in blue to mark the 70th anniversary of the United Nations, in Beijing. Photograph: Li Sanxian/Reuters

The Leaning tower of Pisa in Italy. Photograph: @UN/Twitter

The Tempozan Giant Ferris Wheel, Osaka in Japan. Photograph: Makoto Mihara/ United Nations Information Centres

Jordan’s most attractive tourist feature, the City of Petra. Photograph: Chris Herwig/ Office of UN Resident and Humanitarian Coordinator in Jordan

Gandhiji’s Sabarmati Ashram in Ahmedabad. Photograph: @UN/Twitter

Centre Mondial de la Paix, Verdun, France. Photograph: Philippe Hansch/ United Nations Information Centres

The Peace Palace at The Hague, which houses the International Court of Justice, celebrated the milestone. Photograph: Marcel Vogel/United Nations Information Centres