ArtPrize is an open, independently organized international art competition which takes place for 19 days every other fall in Grand Rapids, Michigan.  $250,000 in prizes are awarded by smartphone-enabled public vote, including a $200,000 grand prize.

Any artist working in any medium from anywhere in the world can participate. Art is exhibited throughout downtown Grand Rapids—museums, bars, public parks, restaurants, theaters, hotels, bridges, laundromats, auto body shops, vacant storefronts and office spaces.

https://www.artprize.org/