If you happen to be planning a trip to San Francisco then it might be in your best interest to follow the Twitter account Hidden Cash.
The mysterious user is hiding money all over the city and dropping hints on Twitter as to its whereabouts. After the money has been hidden, the profile alerts the followers with a vague photo or riddled tweet.
If you’re lucky enough to un-code the clues, then the money could be yours – unless one of the profile’s 42K other followers gets to the location first.
The wealthy donor is thought to be a real estate magnate, who describes the project as a ‘social experiment.’