UPDATED — May 29, 2:10 a.m. ET:
On Twitter, @HiddenCash describes itself as "an anonymous social experiment for good."
New drop: This is the view from behind the blue railing. Also look for something white and folded.
The anonymous person behind the account has been hiding envelopes filled with cash "around SF & beyond."
@HiddenCash Next happy hour round is on me, thanks @HiddenCash!
To locate money hidden across the region, @HiddenCash has been sending out clues, which usually include a photo hint.
Couldn't help do one last one before leaving town. MEDIA will love this one. There's lots of green in these bushes.
The account encourages those who find the money to tweet a photo and tag Hidden Cash.
Latest drop by @hiddencash ... in the @nbcbayarea parking lot! Crazy fun!
Money has been found throughout San Francisco: inside a record album in Amoeba Records, taped onto parking meters, attached to a bulldozer...
@HiddenCash this was great. Amoeba records in a We are the world vinyl!!
And even at the beach.
thanks @HiddenCash, sharing most of it with other beachgoers. have a great day!
Some people have reported finding as much as $100.
Thanks @HiddenCash
Alex from San Jose found $130. He looks pretty stoked about it too:
VIDEO: In case you missed it. Alex from #SanJose finds $130 in @HiddenCash live on KTVU http://t.co/B2m0eZySNU
The person behind the account has remained anonymous so far, saying he doesn't want the attention on him, but on the project itself. The @HiddenCash account now has more than 200,000 followers.
You'll find white swans here; and, if you're lucky, a white envelope. (Too easy???)
The man behind the account said in a phone interview with KTVU that he made his money in San Francisco real estate. “The last real estate deal I did I made about half a million dollars. I can afford to give a lot,” he said.
Thank you @HiddenCash work as a team share as a team #positivevibes #payitforward @Decembrsveryown @LJnotwitter
Many people have been impressed with the idea behind @HiddenCash.
I wish all millionaires followed @HiddenCash 's lead. This IS the very meaning of paying it forward.
And think it's a great way to pay it forward.
I hope whoever finds @HiddenCash's next drop gives some or all of their findings to charity. #payitforward
While others have criticized @HiddenCash for not giving money directly to charities, the anonymous benefactor has said he does donate to such organizations, including the San Francisco Food Bank.
New SF drop: find Mr. Franklin along the "crookedest street" (towards the bottom). Retweet when you find.
He said his treasure hunts are for fun and are meant to "put a smile on someone's face."
Painted ladies @HiddenCash
He also said he would like people who can afford it, to "pay it forward" and give or share the money they find with someone else.
@HiddenCash YESSSSSS had to race another searcher but I WON. (Old catapillar bulldozer on ocean beach)
This guy shared his findings by buying lunch for his co-workers:
Web Producer Adam found @HiddenCash on Friday, bought pizza for the newsroom today! Thanks, man!
Cash was also left in a few spots in San Jose:
Here's a photo of last drop in case you're more visual. Bye for now, San Jose. We'll be back! Next stop: Los Angeles
This lucky lady found some of the cash in San Jose:
Cousin found the last drop of #hiddencash @HiddenCash in san jose. Congrats cousin..
And so did this happy pair:
More San Jose drops coming!
The anonymous benefactor also said in an interview with CNN that he plans to continue his project indefinitely and is hoping to expand...
Thx for all the ❤️ @HiddenCash is going nationwide! Let your friends around the country know 2 follow 4 clues & . Next wknd: LA
Wednesday night, @HiddenCash tweeted that it was about to make its first drop in L.A.
Hiddencash is coming to Los Angeles tonight. First drop in a few hours. Hope you're up LAte!
Wednesday night, @HiddenCash tweeted that it had made its first drop in L.A.
First LA drop! Get close to the water, but no need to get wet at this famous fountain.
BuzzFeed reached out to @HiddenCash for this story, but has not yet received a response.