On June 25, 1899, all four major Denver newspapers, the Times, the Post, the Republican, and the Rocky Mountain News, ran front-page stories saying that the Chinese were planning to demolish the Great Wall of China and build a road in its place.
They weren’t, obviously — the hoax was dreamed up by a cabal of bored reporters — but the story survived and even spread. Two weeks after the Denver publication, a large Eastern newspaper picked it up, adding confirming “quotes” by earnest Chinese and including its own illustrations and comments. Soon the story had spread throughout the United States and even entered Europe.
The full truth didn’t emerge until the last surviving reporter revealed the hoax.