On Saturday, the United Nations headquarters in New York City turned blue to mark the global body's 70th anniversary.
Countries around the world also celebrated U.N. Day, which commemorates the date the U.N. Charter came into force and the organization officially came into being.
"The timeless values of the U.N. Charter must remain our guide," U.N. Secretary-General Ban Ki-moon said in a statement. "Our shared duty is to 'unite our strength' to serve 'we the peoples.'"
"To mark this anniversary, monuments and buildings across the world are being illuminated in U.N. blue," he said. "As we shine a light on this milestone anniversary, let us reaffirm our commitment to a better and brighter future for all."
The Great Wall of China looked ghostly as it turned blue for the anniversary.
In Spain, Madrid's Cibeles Palace, or City Hall, looked more elegant than ever with its blue highlights.
In Amman, Jordan, the moon rose over the blue Roman pillars of the Temple of Hercules.
In Mexico City, the Angel of Independence had a golden glow as its pillar matched the blue backdrop of the sky.
In Egypt, the Sphinx and the Great Pyramids also had the blues...
As did the Empire State Building in New York City.
In Rio de Janeiro, Brazil, the fog made it a little hard to make out the blue Christ the Redeemer statue.
In Brussels, Belgium, the blue lights highlighted the intricate facade on the Grand Palace...
And the World Peace Center in Verdun, France, was looking hauntingly beautiful.
In Australia, the Sydney Opera House's shade of blue stood out as ferries and boats whizzed by.
Happy birthday, U.N.!
