Flea market on King's Day in city of Rijswijk in Netherlands...

RIJSWIJK, NETHERLANDS - 2018/04/27: Flea market on King's Day in city of Rijswijk in Netherlands. Koningsdag or King's Day is a national holiday in the Kingdom of the Netherlands. Celebrated on 27 April, the date marks the birth of King Willem-Alexander. Koningsdag is known for its nationwide vrijmarkt ("free market"), at which the Dutch sell their used items. (Photo by Hendrik Osula/SOPA Images/LightRocket via Getty Images)