An American millionaire is leaving 20 envelopes containing £100 each in parks across London this weekend after a treasure hunt he started became a social media phenomenon in the U.S.
Property magnate Jason Buzi and his Hidden Cash team left almost $15,000 across a number of American cities over the last month.
Earlier this week, the group's Twitter account announced it was coming to London.
The account also teased cash could also be left in other UK cities.
And on Friday the first clue was announced.
We want to see how London goes first and then we'll decide whether to expand it around the UK.Londoners are big Twitter users so I'm sure there will be quite a crowd. You guys seem to love a treasure hunt so it could become a scramble for the money.
He also revealed there were plans to take the treasure hunt to Paris and Madrid as he wanted the "pay it forward" message to spread.
“We want this to be a global movement. We are not trillionaires, but we earned a lot of money in our lives and want to pay it forward, just as we want all the winners to pay it forward too," he said.
Last month, a UK version of Hidden Cash began leaving money around the country.
But now the original treasure hunt has arrived things are getting really interesting.
Here's that clue one more time – "Large space where green meets blue. Saturday neither early nor late."